0000936395-21-000040 | 10-Q | XBRL Viewer

Print Document View Excel Document

Cover - shares	9 Months Ended
Cover - shares	Jul. 31, 2021	Sep. 03, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2021
Document Transition Report	false
Entity File Number	001-36250
Entity Registrant Name	Ciena Corp
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2725311
Entity Address, Address Line One	7035 Ridge Road
Entity Address, City or Town	Hanover
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21076
City Area Code	410
Local Phone Number	694-5700
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	CIEN
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		154,929,206
Entity Central Index Key	0000936395
Current Fiscal Year End Date	--10-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Revenue:
Total revenue	$ 988,141	$ 976,712	$ 2,579,198	$ 2,703,677
Cost of goods sold:
Total cost of goods sold	513,591	512,031	1,334,338	1,455,135
Gross profit	474,550	464,681	1,244,860	1,248,542
Operating expenses:
Research and development	146,225	130,221	389,212	392,651
Selling and marketing	114,924	94,763	322,589	303,043
General and administrative	48,863	41,635	132,491	126,133
Significant asset impairments and restructuring costs	9,789	6,515	23,865	14,798
Amortization of intangible assets	5,967	5,840	17,896	17,532
Acquisition and integration costs (recoveries)	259	(2,329)	860	904
Total operating expenses	326,027	276,645	886,913	855,061
Income from operations	148,523	188,036	357,947	393,481
Interest and other income (loss), net	795	232	(1,600)	1,213
Interest expense	(7,776)	(7,251)	(22,921)	(23,926)
Loss on extinguishment and modification of debt	0	0	0	(646)
Income before income taxes	141,542	181,017	333,426	370,122
Provision (benefit) for income taxes	(96,690)	38,750	(63,271)	73,872
Net income	$ 238,232	$ 142,267	$ 396,697	$ 296,250
Basic net income per common share (in dollars per share)	$ 1.53	$ 0.92	$ 2.55	$ 1.92
Diluted net income per potential common share (in dollars per share)	$ 1.52	$ 0.91	$ 2.53	$ 1.90
Weighted average basic common shares outstanding (in shares)	155,271	154,184	155,277	154,136
Weighted average dilutive potential common shares outstanding (in shares)	156,744	156,318	156,742	155,741
Products
Revenue:
Total revenue	$ 804,414	$ 819,022	$ 2,071,677	$ 2,246,129
Cost of goods sold:
Total cost of goods sold	420,236	436,227	1,074,935	1,230,378
Services
Revenue:
Total revenue	183,727	157,690	507,521	457,548
Cost of goods sold:
Total cost of goods sold	$ 93,355	$ 75,804	$ 259,403	$ 224,757

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME GAIN (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Net income	$ 238,232	$ 142,267	$ 396,697	$ 296,250
Change in unrealized gain (loss) on available-for-sale securities, net of tax	(21)	(241)	(28)	69
Change in cumulative translation adjustments	(6,823)	15,169	19,439	(6,321)
Other comprehensive gain (loss)	(9,990)	21,197	30,728	(18,105)
Total comprehensive income	228,242	163,464	427,425	278,145
Change in unrealized gain (loss) on foreign currency forward contracts, net of tax
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	(4,766)	6,245	5,667	(1,773)
Change in unrealized gain (loss) on forward starting interest rate swaps, net of tax
Change in unrealized gain (loss) on foreign currency forward contracts and forward starting interest rate swaps, net of tax	$ 1,620	$ 24	$ 5,650	$ (10,080)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 65
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580

Reference 25: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669625-108580

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 35: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

+ Details

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,230,441	$ 1,088,624
Short-term investments	182,010	150,667
Accounts receivable, net of allowance for credit losses of $9.9 million and $10.6 million as of July 31, 2021 and October 31, 2020, respectively.	878,229	719,405
Inventories, net	370,170	344,379
Prepaid expenses and other	323,283	308,084
Total current assets	2,984,133	2,611,159
Long-term investments	60,888	82,226
Equipment, building, furniture and fixtures, net	288,937	272,377
Operating right-of-use assets	48,937	57,026
Goodwill	311,569	310,847
Other intangible assets, net	73,974	96,647
Deferred tax asset, net	784,702	647,805
Other long-term assets	102,728	102,830
Total assets	4,655,868	4,180,917
Current liabilities:
Accounts payable	301,606	291,904
Accrued liabilities and other short-term obligations	373,291	334,132
Deferred revenue	126,179	108,700
Operating lease liabilities	19,085	19,035
Current portion of long-term debt	6,930	6,930
Total current liabilities	827,091	760,701
Long-term deferred revenue	57,720	49,663
Other long-term obligations	123,731	123,185
Long-term operating lease liabilities	51,235	61,415
Long-term debt, net	671,855	676,356
Total liabilities	1,731,632	1,671,320
Commitments and contingencies
Stockholders’ equity:
Preferred stock – par value $0.01; 20,000,000 shares authorized; zero shares issued and outstanding	0	0
Common stock – par value $0.01; 290,000,000 shares authorized; 155,103,315 and 154,563,005 shares issued and outstanding	1,551	1,546
Additional paid-in capital	6,815,946	6,826,531
Accumulated other comprehensive loss	(4,630)	(35,358)
Accumulated deficit	(3,888,631)	(4,283,122)
Total stockholders’ equity	2,924,236	2,509,597
Total liabilities and stockholders’ equity	$ 4,655,868	$ 4,180,917

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 9.9	$ 10.6
Stockholders’ equity:
Preferred stock par value per share (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	20,000,000	20,000,000
Preferred stock shares issued (in shares)	0	0
Preferred stock shares outstanding (in shares)	0	0
Common stock par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	290,000,000	290,000,000
Common stock shares issued (in shares)	155,103,315	154,563,005
Common stock shares outstanding (in shares)	155,103,315	154,563,005

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020
Cash flows provided by operating activities:
Net income	$ 396,697	$ 296,250
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of equipment, building, furniture and fixtures, and amortization of leasehold improvements	71,918	70,370
Share-based compensation costs	62,970	50,838
Amortization of intangible assets	27,341	29,035
Deferred taxes	(139,543)	57,636
Provision for inventory excess and obsolescence	13,460	20,176
Provision for warranty	12,726	19,172
Other	6,350	15,085
Changes in assets and liabilities:
Accounts receivable	(163,149)	(6,688)
Inventories	(38,821)	(39,568)
Prepaid expenses and other	(17,272)	(52,945)
Operating lease right-of-use assets	12,340	12,816
Accounts payable, accruals and other obligations	31,388	(131,647)
Deferred revenue	24,969	(19,039)
Short- and long-term operating lease liabilities	(14,618)	(15,132)
Net cash provided by operating activities	286,756	306,359
Cash flows used in investing activities:
Payments for equipment, furniture, fixtures and intellectual property	(67,290)	(61,333)
Purchase of available-for-sale securities	(132,895)	(39,859)
Proceeds from maturities of available-for-sale securities	122,063	90,000
Settlement of foreign currency forward contracts, net	7,326	3,067
Acquisition of business, net of cash acquired	0	(28,300)
Proceeds from sale of equity investment	4,678	0
Net cash used in investing activities	(66,118)	(36,425)
Cash flows used in financing activities:
Payment of long-term debt	(5,197)	(3,465)
Payment of debt issuance costs	0	(382)
Payment of finance lease obligations	(2,243)	(2,030)
Shares repurchased for tax withholdings on vesting of stock unit awards	(36,484)	(26,328)
Repurchases of common stock - repurchase program	(64,555)	(74,535)
Proceeds from issuance of common stock	28,289	27,986
Net cash used in financing activities	(80,190)	(78,754)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	1,344	(1,526)
Net increase in cash, cash equivalents and restricted cash	141,792	189,654
Cash, cash equivalents and restricted cash at beginning of period	1,088,708	904,161
Cash, cash equivalents and restricted cash at end of period	1,230,500	1,093,815
Supplemental disclosure of cash flow information
Cash paid during the period for interest	22,392	25,278
Cash paid during the period for income taxes, net	46,165	41,316
Operating lease payments	16,162	16,762
Non-cash investing and financing activities
Purchase of equipment in accounts payable	5,517	4,200
Repurchase of common stock in accrued liabilities from repurchase program	800	0
Operating lease right-of-use assets subject to lease liability	$ 4,182	$ 11,404

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock Shares	Additional Paid-in-Capital	Accumulated Other Comprehensive Gain (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Nov. 02, 2019			154,403,850
Equity - beginning balance at Nov. 02, 2019	$ 2,172,761		$ 1,544	$ 6,837,714	$ (22,084)	$ (4,644,413)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	296,250					296,250
Other comprehensive income (loss)	(18,105)				(18,105)
Repurchase of common stock - repurchase program (in shares)			(1,872,446)
Repurchase of common stock - repurchase program	(74,535)		$ (19)	(74,516)
Issuance of shares from employee equity plans (in shares)			2,392,414
Issuance of shares from employee equity plans	27,986		$ 24	27,962
Share-based compensation expense	50,838			50,838
Shares repurchased for tax withholdings on vesting of stock unit awards (in shares)			(605,621)
Shares repurchased for tax withholdings on vesting of stock unit awards	(26,328)		$ (6)	(26,322)
Ending balance (in shares) at Aug. 01, 2020			154,318,197
Equity- ending balance at Aug. 01, 2020	2,428,867		$ 1,543	6,815,676	(40,189)	(4,348,163)
Beginning balance (in shares) at Nov. 02, 2019			154,403,850
Equity - beginning balance at Nov. 02, 2019	$ 2,172,761		$ 1,544	6,837,714	(22,084)	(4,644,413)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Ending balance (in shares) at Oct. 31, 2020	154,563,005		154,563,005
Equity- ending balance at Oct. 31, 2020	$ 2,509,597	$ (2,206)	$ 1,546	6,826,531	(35,358)	(4,283,122)	$ (2,206)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	396,697					396,697
Other comprehensive income (loss)	30,728				30,728
Repurchase of common stock - repurchase program (in shares)			(1,203,439)
Repurchase of common stock - repurchase program	(65,355)		$ (12)	(65,343)
Issuance of shares from employee equity plans (in shares)			2,430,224
Issuance of shares from employee equity plans	28,289		$ 24	28,265
Share-based compensation expense	62,970			62,970
Shares repurchased for tax withholdings on vesting of stock unit awards (in shares)			(686,475)
Shares repurchased for tax withholdings on vesting of stock unit awards	$ (36,484)		$ (7)	(36,477)
Ending balance (in shares) at Jul. 31, 2021	155,103,315		155,103,315
Equity- ending balance at Jul. 31, 2021	$ 2,924,236		$ 1,551	$ 6,815,946	$ (4,630)	$ (3,888,631)

INTERIM FINANCIAL STATEMENTS	9 Months Ended
INTERIM FINANCIAL STATEMENTS	Jul. 31, 2021
Quarterly Financial Data [Abstract]
INTERIM FINANCIAL STATEMENTS	INTERIM FINANCIAL STATEMENTS The interim financial statements included herein for Ciena Corporation and its wholly owned subsidiaries (“Ciena”) have been prepared by Ciena, without audit, pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”). The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires Ciena to make judgments, assumptions, and estimates that affect the amounts reported in the Condensed Consolidated Financial Statements and accompanying notes. The inputs into certain of Ciena’s judgments, assumptions, and estimates reflect, among other things, the information available to Ciena regarding the economic implications of the COVID-19 pandemic, and expectations as to its impact on Ciena’s business. Among other things, these estimates form the basis for judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ materially from these estimates under different assumptions or conditions. To the extent that there are material differences between Ciena’s estimates and actual results, Ciena’s consolidated financial statements will be affected. In addition, because the duration and severity of COVID-19 pandemic are uncertain, certain of these estimates could require further judgment or modification and therefore carry a higher degree of variability and volatility. As events continue to evolve, Ciena’s estimates may change materially in future periods. In the opinion of management, the financial statements included in this report reflect all normal recurring adjustments that Ciena considers necessary for the fair statement of the results of operations of Ciena for the interim periods covered and of the financial position of Ciena at the date of the interim balance sheets. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to SEC rules and regulations. The Condensed Consolidated Balance Sheet as of October 31, 2020 was derived from audited financial statements, but does not include all disclosures required by GAAP. However, Ciena believes that the disclosures are adequate to understand the information presented herein. The operating results for interim periods are not necessarily indicative of the operating results for the entire year. These financial statements should be read in conjunction with Ciena’s audited consolidated financial statements and the notes thereto included in Ciena’s annual report on Form 10-K for fiscal 2020 (the “2020 Annual Report”). Ciena has a 52 or 53-week fiscal year, with quarters ending on the Saturday nearest to the last day of January, April, July and October, respectively, of each year. Fiscal 2021 and 2020 are 52-week fiscal years.

SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
SIGNIFICANT ACCOUNTING POLICIES	Jul. 31, 2021
Accounting Policies [Abstract]
SIGNIFICANT ACCOUNTING POLICIES	SIGNIFICANT ACCOUNTING POLICIES Except for the changes in certain policies described below, there have been no material changes to Ciena’s significant accounting policies, compared to the accounting policies described in Note 1, Ciena Corporation and Significant Accounting Policies and Estimates, in Notes to Consolidated Financial Statements in Item 8 of Part II of the 2020 Annual Report. Newly Issued Accounting Standards - Effective In June 2016, the Financial Accounting Standards Board (the ”FASB”) issued Accounting Standards Update No. 2016-13 (“ASU 2016-13”), Financial Instruments - Credit Losses, which requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Ciena adopted ASU 2016-13 on a modified retrospective basis in the first quarter of fiscal year 2021 through a cumulative-effect adjustment at the beginning of the period of adoption and did not restate prior periods. The standard primarily impacts the value of Ciena’s accounts receivable, net and contract assets, net. Adoption of ASU 2016-13 did not have a material effect on Ciena’s financial position or results of operations. Ciena’s significant accounting policies updated as a result of adopting this standard are as follows: Allowance for Credit Losses for Accounts Receivable and Contract Assets Ciena estimates its allowances for credit losses using relevant available information from internal and external sources, related to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. When assessing for credit losses, Ciena determines collectability by pooling assets with similar characteristics. The allowances for credit losses are each measured on a collective basis when similar risk characteristics exist. The allowances for credit losses are each measured by multiplying the exposure probability of default (the probability the asset will default within a given time frame) by the loss given default rate (the percentage of the asset not expected to be collected due to default) based on the pool of assets. Probability of default rates are published by third-party credit rating agencies. Adjustments to Ciena’s exposure probability may take into account a number of factors, including, but not limited to, various customer-specific factors, the potential sovereign risk of the geographic locations in which the customer is operating and macroeconomic conditions. These factors are updated regularly or when facts and circumstances indicate that an update is deemed necessary. Newly Issued Accounting Standards - Not Yet Effective In March 2020, the FASB issued ASU No. 2020-04 (“ASU 2020-04”), Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04 provides temporary optional guidance on contract modifications and hedging accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) to alternative reference rates. In January 2021, the FASB issued ASU 2021-01, which refines the scope of Topic 848 and clarifies some of its guidance as part of the FASB’s monitoring of global reference rate activities. The new guidance was effective upon issuance, and Ciena is allowed to elect to apply the amendments prospectively through December 31, 2022. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU No. 2019-12 (“ASU 2019-12”), Income Taxes (ASC 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application of and simplify GAAP for other areas of ASC 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for Ciena beginning in the first quarter of fiscal year 2022, and early adoption is permitted. Most amendments within this standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures.

REVENUE

9 Months Ended

Jul. 31, 2021

Revenue from Contract with Customer [Abstract]

REVENUE

Disaggregation of Revenue

Ciena’s disaggregated revenue represents similar groups that depict the nature, amount, and timing of revenue and cash flows for Ciena’s various offerings. The sales cycle, contractual obligations, customer requirements, and go-to-market strategies may differ for each of its product lines, resulting in different economic risk profiles for each line. Effective as of the beginning of fiscal 2021, Ciena renamed its “Packet Networking” product line to “Routing and Switching.” This change, affecting only the presentation of such information, was made on a prospective basis and does not impact comparability of previous financial results. References to prior reported “Packet Networking” product line have been changed herein to “Routing and Switching.”

The tables below set forth Ciena’s disaggregated revenue for the respective periods (in thousands):


	Quarter Ended July 31, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	712,906	$	—	$	—	$	—	$	712,906
Routing and Switching	69,698		—		—		—		69,698
Platform Software and Services	—		56,945		—		—		56,945
Blue Planet Automation Software and Services	—		—		16,607		—		16,607
Maintenance Support and Training	—		—		—		74,006		74,006
Installation and Deployment	—		—		—		46,653		46,653
Consulting and Network Design	—		—		—		11,326		11,326
Total revenue by product line	$	782,604	$	56,945	$	16,607	$	131,985	$	988,141

Timing of revenue recognition:
Products and services at a point in time	$	782,604	$	17,928	$	4,558	$	6,508	$	811,598
Services transferred over time	—		39,017		12,049		125,477		176,543
Total revenue by timing of revenue recognition	$	782,604	$	56,945	$	16,607	$	131,985	$	988,141


	Quarter Ended August 1, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	722,512	$	—	$	—	$	—	$	722,512
Routing and Switching	79,756		—		—		—		79,756
Platform Software and Services	—		46,422		—		—		46,422
Blue Planet Automation Software and Services	—		—		11,297		—		11,297
Maintenance Support and Training	—		—		—		69,099		69,099
Installation and Deployment	—		—		—		39,798		39,798
Consulting and Network Design	—		—		—		7,828		7,828
Total revenue by product line	$	802,268	$	46,422	$	11,297	$	116,725	$	976,712

Timing of revenue recognition:
Products and services at a point in time	$	802,268	$	15,838	$	410	$	3,300	$	821,816
Services transferred over time	—		30,584		10,887		113,425		154,896
Total revenue by timing of revenue recognition	$	802,268	$	46,422	$	11,297	$	116,725	$	976,712


	Nine Months Ended July 31, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	1,798,888	$	—	$	—	$	—	$	1,798,888
Routing and Switching	197,632		—		—		—		197,632
Platform Software and Services	—		163,472		—		—		163,472
Blue Planet Automation Software and Services	—		—		57,499		—		57,499
Maintenance Support and Training	—		—		—		212,054		212,054
Installation and Deployment	—		—		—		124,263		124,263
Consulting and Network Design	—		—		—		25,390		25,390
Total revenue by product line	$	1,996,520	$	163,472	$	57,499	$	361,707	$	2,579,198

Timing of revenue recognition:
Products and services at a point in time	$	1,996,520	$	54,756	$	20,497	$	9,776	$	2,081,549
Services transferred over time	—		108,716		37,002		351,931		497,649
Total revenue by timing of revenue recognition	$	1,996,520	$	163,472	$	57,499	$	361,707	$	2,579,198


	Nine Months Ended August 1, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	1,968,355	$	—	$	—	$	—	$	1,968,355
Routing Switching	211,432		—		—		—		211,432
Platform Software and Services	—		143,295		—		—		143,295
Blue Planet Automation Software and Services	—		—		41,779		—		41,779
Maintenance Support and Training	—		—		—		202,370		202,370
Installation and Deployment	—		—		—		108,994		108,994
Consulting and Network Design	—		—		—		27,452		27,452
Total revenue by product line	$	2,179,787	$	143,295	$	41,779	$	338,816	$	2,703,677

Timing of revenue recognition:
Products and services at a point in time	$	2,179,787	$	45,930	$	8,891	$	12,174	$	2,246,782
Services transferred over time	—		97,365		32,888		326,642		456,895
Total revenue by timing of revenue recognition	$	2,179,787	$	143,295	$	41,779	$	338,816	$	2,703,677

Ciena reports its sales geographically using the following markets: (i) Americas; (ii) Europe, Middle East and Africa (“EMEA”); and (iii) Asia Pacific, Japan and India (“APAC”). Americas includes activities in North America and South America. Within each geographic area, Ciena maintains specific teams or personnel that focus on a particular region, country, customer or market vertical. These teams include sales management, account salespersons and sales engineers, as well as services professionals and commercial management personnel. The following table reflects Ciena’s geographic distribution of revenue based principally on the relevant location for Ciena’s delivery of products and performance of services.

For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Geographic distribution:
Americas	$	692,853	$	713,340	$	1,776,939	$	1,937,725
EMEA	189,180		162,465		499,652		433,861
APAC	106,108		100,907		302,607		332,091
Total revenue by geographic distribution	$	988,141	$	976,712	$	2,579,198	$	2,703,677

Ciena’s revenue includes $623.9 million and $647.0 million of United States revenue for the third quarter of fiscal 2021 and 2020, respectively. For the nine months ended July 31, 2021 and August 1, 2020, United States revenue was $1.6 billion and $1.8 billion, respectively. No other country accounted for 10% or more of total revenue for the periods presented above.

For the periods below, the only customers that accounted for at least 10% of Ciena’s revenue were as follows (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Verizon	$	131,892	n/a		n/a		$	272,200
Web-scale provider	119,728		n/a		n/a		n/a
AT&T	119,199		114,963		313,140		304,645
Total	$	370,819	$	114,963	$	313,140	$	576,845


n/a			Denotes revenue representing less than 10% of total revenue for the period

The Web-scale provider noted in the above table purchased products from each of Ciena’s operating segments excluding Blue Planet® Automation Software and Services. The other customers identified above purchased products and services from each of Ciena’s operating segments.

•Networking Platforms revenue reflects sales of Ciena’s Converged Packet Optical and Routing and Switching product lines.

◦Converged Packet Optical - includes the 6500 Packet-Optical Platform, the Waveserver® stackable interconnect system, the 6500 Reconfigurable Line System (RLS) and the 5400 family of Packet-Optical Platforms. This product line also includes sales of the Z-Series Packet-Optical Platform.

◦Routing and Switching - includes the 3000 family of service delivery switches and service aggregation switches and the 5000 family of service aggregation switches. This product line also includes the 8700 Packetwave Platform, the Ethernet packet configuration for the 5410 Service Aggregation Switch, and the 6500 Packet Transport System (PTS), which combines packet switching, control plane operation, and integrated optics.

The Networking Platforms segment also includes sales of operating system software and enhanced software features embedded in each of the product lines above. Revenue from this segment is included in product revenue on the Condensed Consolidated Statements of Operations. Operating system software and enhanced software features embedded in Ciena hardware are each considered distinct performance obligations for which the revenue is generally recognized upfront at a point in time upon transfer of control.

•Platform Software and Services provides analytics, data, and planning tools to assist customers in managing Ciena’s Networking Platforms products in their networks. Ciena’s platform software includes its Manage, Control and Plan (MCP) domain controller solution and its OneControl Unified Management System, as well as planning tools and a number of legacy software solutions that support Ciena’s installed base of network solutions. Platform software-related services revenue includes sales of subscription, installation, support, and consulting services related to Ciena’s software platforms, operating system software and enhanced software features embedded in each of the Networking Platforms product lines above. Revenue from the software portion of this segment is included in product revenue on the Condensed Consolidated Statements of Operations. Revenue from services portions of this segment is included in services revenue on the Condensed Consolidated Statements of Operations.

•Blue Planet® Automation Software and Services is a comprehensive, micro-services, standards-based open software suite, together with related services, that enables customers to implement large-scale software and IT-led operations support system (OSS) transformations by transforming legacy networks into “service ready” networks, accelerating the creation, delivery and lifecycle management of new, cloud-based services. Ciena’s Blue Planet Automation Platform includes multi-domain service orchestration (MDSO), inventory management (BPI), route optimization and analysis (ROA), network function virtualization orchestration (NFVO), and unified assurance and analytics (UAA). Services revenue includes sales of subscription, installation, support, consulting and design services related to Ciena’s Blue Planet Automation Platform. Revenue from the software portion of this segment is included in product revenue on the Condensed Consolidated Statements of Operations. Revenue from services portions of this segment is included in services revenue on the Condensed Consolidated Statements of Operations.

Ciena’s software platform revenue typically reflects either perpetual or term-based software licenses, and these sales are considered distinct performance obligations where revenue is generally recognized upfront at a point in time upon transfer of control. Revenue from software subscription and support is recognized ratably over the period during which the services are performed. Revenue from professional services for solution customization, software and solution support services, consulting and design, and build-operate-transfer services relating to Ciena’s software offerings is recognized over time with Ciena applying the input method to determine the amount of revenue to be recognized in a given period.

•Global Services revenue reflects sales of a broad range of Ciena’s services for maintenance support and training, installation and deployment, and consulting and network design activities. Revenue from this segment is included in services revenue on the Condensed Consolidated Statements of Operations.

Ciena’s Global Services are considered a distinct performance obligation where revenue is generally recognized over time. Revenue from maintenance support is recognized ratably over the period during which the services are performed. Revenue from installation and deployment services and consulting and network design services is recognized over time with Ciena applying the input method to determine the amount of revenue to be recognized in a given period. Revenue from training services is generally recognized at a point in time upon completion of the service.

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):


	Balance at July 31, 2021		Balance at October 31, 2020
Accounts receivable, net	$	878,229	$	719,405
Contract assets for unbilled accounts receivable, net	$	98,812	$	85,843
Deferred revenue	$	183,899	$	158,363

Ciena’s contract assets represent unbilled accounts receivable, net where transfer of a product or service has occurred but invoicing is conditional upon completion of future performance obligations. These amounts are primarily related to installation and deployment and professional services arrangements where transfer of control has occurred, but Ciena has not yet invoiced the customer. Contract assets are included in prepaid expenses and other current assets in the Condensed Consolidated Balance Sheets. See Note 11 below.

Contract liabilities consist of deferred revenue and represent advanced payments against non-cancelable customer orders received prior to revenue recognition. Ciena recognized approximately $94.7 million and $91.8 million of revenue during the first nine months of fiscal 2021 and 2020, respectively, that was included in the deferred revenue balance as of October 31, 2020 and November 2, 2019, respectively. Revenue recognized due to changes in transaction price from performance obligations satisfied or partially satisfied in previous periods was immaterial during the nine months ended July 31, 2021 and August 1, 2020.

Capitalized Contract Acquisition Costs

Capitalized contract acquisition costs consist of deferred sales commissions, and were $20.4 million and $15.3 million as of July 31, 2021 and October 31, 2020, respectively. Capitalized contract acquisition costs were included in prepaid expenses and other and other long-term assets. The amortization expense associated with these costs was $16.8 million and $16.2 million during the first nine months of fiscal 2021 and 2020, respectively, and was included in sales and marketing expense.

Remaining Performance Obligations

Remaining Performance Obligations (“RPO”) are comprised of non-cancelable customer purchase orders for products and services that are awaiting transfer of control for revenue recognition under the applicable contract terms. As of July 31, 2021, the aggregate amount of RPO was $1.4 billion. As of July 31, 2021, Ciena expects approximately 85% of the RPO to be recognized as revenue within the next twelve months.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

+ Details

CANADIAN EMERGENCY WAGE SUBSIDY

9 Months Ended

Jul. 31, 2021

Unusual or Infrequent Items, or Both [Abstract]

CANADIAN EMERGENCY WAGE SUBSIDY

In April 2020, the Canadian government introduced the Canada Emergency Wage Subsidy (“CEWS”) to help employers offset a portion of their employee wages for a limited period in response to the COVID-19 outbreak, retroactive to March 15, 2020. The CEWS program has been extended through October 23, 2021. The subsidy covers employers of all sizes and across all sectors.

Ciena accounts for proceeds from government grants as a reduction of expense when there is reasonable assurance that Ciena has met the required conditions associated with the grant and that grant proceeds will be received. Grant benefits are recorded to the particular line item of the Condensed Consolidated Statement of Operations to which the grant activity relates. Amounts from the CEWS program positively impacted our operating expense and measures of profit in the third quarter of fiscal 2021 and nine months ended July 31, 2021. For the third quarter of fiscal 2021, Ciena recorded CEWS benefits of CAD$1.1 million ($0.8 million), net of certain fees. For the nine months ended July 31, 2021, Ciena recorded a CAD$52.2 million ($41.3 million) benefit, net of certain fees, related to CEWS for claim periods beginning March 15, 2020, including CAD$43.9 million ($35.2 million) related to employee wages during fiscal 2020. As of July 31, 2021, amounts receivable from this subsidy were CAD$1.5 million ($1.2 million).

The following table summarizes CEWS for the periods indicated (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Product	$	94	$	—	$	4,283	$	—
Service	47		—		2,667		—
CEWS benefit in cost of goods sold	141		—		6,950		—
Research and development	596		—		29,519		—
Sales and marketing	53		—		2,604		—
General and administrative	46		—		2,207		—
CEWS benefit in operating expense	695		—		34,330		—
Total CEWS benefit	$	836	$	—	$	41,280	$	—

RESTRUCTURING COSTS

9 Months Ended

Jul. 31, 2021

Restructuring and Related Activities [Abstract]

RESTRUCTURING COSTS

Ciena has undertaken a number of restructuring activities intended to reduce expense and to ensure better alignment of its workforce and costs with market opportunities, product development and business strategies. The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in Accrued liabilities and other short-term obligations on Ciena’s Condensed Consolidated Balance Sheets, for the nine months ended July 31, 2021 (in thousands):


	Workforce reduction			Other restructuring activities			Total
Balance at October 31, 2020	$	2,915		$	—		$	2,915
Charges	5,306		(1)	18,558		(2)	23,864

Cash payments	(7,051)			(18,558)			(25,609)
Balance at July 31, 2021	$	1,170		$	—		$	1,170
Current restructuring liabilities	$	1,170		$	—		$	1,170

(1) Reflects a global workforce reduction of 120 employees during the nine months ended July 31, 2021 as part of a business optimization strategy to improve gross margin, constrain operating expense and redesign certain business processes.

(2) Primarily represents the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization, and costs related to restructured facilities.

The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in Accrued liabilities and other short-term obligations on Ciena’s Condensed Consolidated Balance Sheets for the nine months ended August 1, 2020 (in thousands):


	Workforce reduction			Other restructuring activities			Total
Balance at November 2, 2019	$	3,983		$	11,160		$	15,143
Charges	5,015		(1)	9,783		(2)	14,798

Adjustments related to ASC 842	—			(11,160)		(3)	(11,160)
Cash payments	(7,335)			(9,783)			(17,118)
Balance at August 1, 2020	$	1,663		$	—		$	1,663
Current restructuring liabilities	$	1,663		$	—		$	1,663

(1) Reflects a global workforce reduction of approximately 79 employees during the nine months ended August 1, 2020 as part of a business optimization strategy to improve gross margin, constrain operating expense and redesign certain business processes.

(2) Primarily represents variable costs and imputed interest expense related to restructured facilities.

(3) Represents restructuring reserve liability recognized as a reduction to Operating right-of-use (“ROU”) assets, net in relation to adoption of ASC 842.

INTEREST AND OTHER INCOME (LOSS), NET

9 Months Ended

Jul. 31, 2021

Other Income and Expenses [Abstract]

INTEREST AND OTHER INCOME (LOSS), NET

The components of interest and other income (loss), net, are as follows (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Interest income	$	465	$	849	$	1,553	$	6,262

Gains (losses) on non-hedge designated foreign currency forward contracts	(4,414)		1,282		5,295		3,005
Foreign currency exchange gains (losses)	4,959		(2,537)		(8,534)		(7,376)

Other	(215)		638		86		(678)
Interest and other income (loss), net	$	795	$	232	$	(1,600)	$	1,213

Ciena Corporation, as the U.S. parent entity, uses the U.S. Dollar as its functional currency; however, some of its foreign branch offices and subsidiaries use local currencies as their functional currencies. Ciena recorded $8.5 million and $7.4 million in foreign currency exchange rate losses during the first nine months of fiscal 2021 and 2020, respectively, as a result of monetary assets and liabilities that were transacted in a currency other than Ciena’s functional currency. The related remeasurement adjustments were recorded in interest and other income (loss), net, on the Condensed Consolidated Statements of Operations. From time to time, Ciena uses foreign currency forwards to hedge this type of balance sheet exposure. These forwards are not designated as hedges for accounting purposes, and any net gain or loss associated with these derivatives is reported in interest and other income (loss), net, on the Condensed Consolidated Statements of Operations. During the first nine months of fiscal 2021 and 2020, respectively, Ciena recorded gains of $5.3 million and $3.0 million from non-hedge designated foreign currency forward contracts.

INCOME TAXES	9 Months Ended
INCOME TAXES	Jul. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXESThe effective tax rate for the quarter and nine months ended July 31, 2021 was lower than the effective tax rate for the quarter and nine months ended August 1, 2020, primarily due to the tax benefit associated with recording a deferred tax asset. To accommodate the requirements of a global business, Ciena has begun reorganizing its global supply chain and distribution structure, which includes a legal entity reorganization and related system upgrade. During the quarter, Ciena completed an internal transfer of certain of its non-U.S. intangible assets, which created amortizable tax basis resulting in the discrete recognition of a $124.2 million deferred tax asset with a corresponding tax benefit. The impact of this transfer is reflected in Ciena’s effective tax rate for the quarter and nine months ended July 31, 2021, which had a significant, one-time impact on its net income for these periods. Ciena’s future income tax provisions and deferred tax balances may be affected by the amount of pre-tax income, the jurisdictions where it is earned, the existence and ability to utilize tax attributes and changes in tax laws and business reorganizations. Ciena continues to monitor these items and will adopt strategies to address their impact as appropriate.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

SHORT-TERM AND LONG-TERM INVESTMENTS

9 Months Ended

Jul. 31, 2021

Investments, Debt and Equity Securities [Abstract]

SHORT-TERM AND LONG-TERM INVESTMENTS

As of the dates indicated, investments are comprised of the following (in thousands):


	July 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	181,966	$	44	$	—	$	182,010
Included in long-term investments	60,887		7		(6)		60,888
	$	242,853	$	51	$	(6)	$	242,898


	October 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	150,559	$	109	$	(1)	$	150,667
Included in long-term investments	82,252		—		(26)		82,226
	$	232,811	$	109	$	(27)	$	232,893

The following table summarizes the final legal maturities of debt investments at July 31, 2021 (in thousands):


	Amortized Cost		Estimated Fair Value
Less than one year	$	181,966	$	182,010
Due in 1-2 years	60,887		60,888
	$	242,853	$	242,898

FAIR VALUE MEASUREMENTS

9 Months Ended

Jul. 31, 2021

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS As of the date indicated, the following table summarizes the assets and liabilities that are recorded at fair value on a recurring basis (in thousands):


	July 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	909,976	$	—	$	—	$	909,976
Bond mutual fund	75,398		—		—		75,398
Time deposits	30,029		—		—		30,029
Deferred compensation plan assets	12,380		—		—		12,380
U.S. government obligations	—		242,898		—		242,898

Foreign currency forward contracts	—		8,598		—		8,598

Total assets measured at fair value	$	1,027,783	$	251,496	$	—	$	1,279,279

Liabilities:
Foreign currency forward contracts	$	—	$	3,709	$	—	$	3,709
Forward starting interest rate swaps	—		20,682		—		20,682

Total liabilities measured at fair value	$	—	$	24,391	$	—	$	24,391


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	889,293	$	—	$	—	$	889,293
Bond mutual fund	50,361		—		—		50,361
Deferred compensation plan assets	8,213		—		—		8,213
U.S. government obligations	—		232,893		—		232,893

Foreign currency forward contracts	—		82		—		82

Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Foreign currency forward contracts	$	—	$	681	$	—	$	681

Forward starting interest rate swaps	—		28,513		—		28,513

Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194

As of the date indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands):


	July 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	1,015,403	$	—	$	—	$	1,015,403
Short-term investments	—		182,010		—		182,010
Prepaid expenses and other	—		8,598		—		8,598
Long-term investments	—		60,888		—		60,888
Other long-term assets	12,380		—		—		12,380
Total assets measured at fair value	$	1,027,783	$	251,496	$	—	$	1,279,279

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	3,709	$	—	$	3,709
Other long-term obligations	—		20,682		—		20,682
Total liabilities measured at fair value	$	—	$	24,391	$	—	$	24,391


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	939,654	$	—	$	—	$	939,654
Short-term investments	—		150,667		—		150,667
Prepaid expenses and other	—		82		—		82

Other long-term assets	8,213		82,226		—		90,439
Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	681	$	—	$	681

Other long-term obligations	—		28,513		—		28,513
Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194

Ciena did not have any transfers between Level 1 and Level 2 fair value measurements during the periods presented.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

INVENTORIES

9 Months Ended

Jul. 31, 2021

Inventory Disclosure [Abstract]

INVENTORIES

As of the dates indicated, inventories are comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Raw materials	$	139,338	$	119,481
Work-in-process	10,556		13,738
Finished goods	204,580		210,050
Deferred cost of goods sold	53,826		40,747
Gross inventories	408,300		384,016
Provision for excess and obsolescence	(38,130)		(39,637)
Inventories, net	$	370,170	$	344,379

Ciena writes down its inventory for estimated obsolescence or unmarketable inventory by an amount equal to the difference between the cost of inventory and the estimated net realizable value based on assumptions about future demand, which are affected by changes in Ciena’s strategic direction, discontinuance of a product or introduction of newer versions of products, declines in the sales of or forecasted demand for certain products, and general market conditions. During the first nine months of fiscal 2021, Ciena recorded a provision for excess and obsolescence of $13.5 million, primarily related to a decrease in the forecasted demand for certain Networking Platforms products. Deductions from the provision for excess and obsolete inventory relate primarily to disposal activities.

PREPAID EXPENSES AND OTHER

9 Months Ended

Jul. 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

PREPAID EXPENSES AND OTHER

PREPAID EXPENSES AND OTHERAs of the dates indicated, prepaid expenses and other are comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Contract assets for unbilled accounts receivable, net	$	98,812	$	85,843
Prepaid expenses	75,287		70,647
Prepaid VAT and other taxes	70,735		72,838
Product demonstration equipment, net	35,411		44,793
Other non-trade receivables	17,808		21,981
Capitalized contract acquisition costs	15,067		11,296
Derivative assets	8,598		82
CEWS receivable	1,229		—
Deferred deployment expense	336		604
	$	323,283	$	308,084

Depreciation of product demonstration equipment was $7.6 million during the first nine months of fiscal 2021 and $6.5 million during the first nine months of fiscal 2020.

For further discussion on contract assets and capitalized contract acquisition costs, see Note 3 above.

OTHER BALANCE SHEET DETAILS

9 Months Ended

Jul. 31, 2021

Balance Sheet Related Disclosures [Abstract]

OTHER BALANCE SHEET DETAILS

As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Compensation, payroll related tax and benefits	$	142,713	$	135,462
Warranty	48,139		49,868
Income taxes payable	36,526		6,348
Vacation	30,986		26,945



Finance lease obligations	3,395		2,836

Other	111,532		112,673
	$	373,291	$	334,132

The following table summarizes the activity in Ciena’s accrued warranty for the periods indicated (in thousands):


	Beginning Balance		Current Period Provisions	Settlements	Ending Balance
Nine Months Ended August 1, 2020	$	48,498	19,172	(15,504)	$	52,166
Nine Months Ended July 31, 2021	$	49,868	12,726	(14,455)	$	48,139

As of the dates indicated, deferred revenue is comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Products	$	13,380	$	17,534
Services	170,519		140,829
	183,899		158,363
Less current portion	(126,179)		(108,700)
Long-term deferred revenue	$	57,720	$	49,663

DERIVATIVE INSTRUMENTS	9 Months Ended
DERIVATIVE INSTRUMENTS	Jul. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTSForeign Currency Derivatives Ciena conducts business globally in numerous currencies, and thus is exposed to adverse foreign currency exchange rate changes. To limit this exposure, Ciena enters into foreign currency contracts. Ciena does not enter into such contracts for speculative purposes. As of July 31, 2021 and October 31, 2020, Ciena had forward contracts to hedge its foreign exchange exposure in order to reduce variability principally related to research and development activities. The notional amount of these contracts was approximately $219.1 million and $254.9 million as of July 31, 2021 and October 31, 2020, respectively. These foreign exchange contracts have maturities of 24 months or less and have been designated as cash flow hedges. As of July 31, 2021 and October 31, 2020, Ciena had forward contracts to hedge its foreign exchange exposure in order to reduce the variability in various currencies of certain balance sheet items. The notional amount of these contracts was approximately $241.8 million and $212.0 million as of July 31, 2021 and October 31, 2020, respectively. These foreign exchange contracts have maturities of 12 months or less and have not been designated as hedges for accounting purposes. Interest Rate Derivatives Ciena is exposed to floating rates of LIBOR interest on its term loan borrowings (see Note 16 below) and has hedged such risk by entering into floating to fixed interest rate swap arrangements (“interest rate swaps”). The interest rate swaps fix the LIBOR rate for $350.0 million of the 2025 Term Loan (as defined in Note 16 below) at 2.957% through September 2023. The total notional amount of interest rate swaps in effect was $350.0 million as of July 31, 2021 and October 31, 2020. Ciena expects the variable rate payments to be received under the terms of the interest rate swaps to offset exactly the forecasted variable rate payments on the equivalent notional amounts of the term loan. These derivative contracts have been designated as cash flow hedges. Other information regarding Ciena’s derivatives is immaterial for separate financial statement presentation. See Note 6 and Note 9 above.

ACCUMULATED OTHER COMPREHENSIVE INCOME

9 Months Ended

Jul. 31, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME

The following table summarizes the changes in accumulated balances of other comprehensive income (“AOCI”), net of tax, for the nine months ended July 31, 2021 (in thousands):


	Unrealized Gain (Loss) on						Cumulative
	Available-for-sale Securities		Foreign Currency Forward Contracts		Forward Starting Interest Rate Swaps		Foreign Currency Translation Adjustment		Total
Balance at October 31, 2020	$	45	$	(219)	$	(21,535)	$	(13,649)	$	(35,358)
Other comprehensive gain (loss) before reclassifications	(28)		13,574		(1,399)		19,439		31,586
Amounts reclassified from AOCI	—		(7,907)		7,049		—		(858)
Balance at July 31, 2021	$	17	$	5,448	$	(15,885)	$	5,790	$	(4,630)

The following table summarizes the changes in AOCI, net of tax, for the nine months ended August 1, 2020 (in thousands):


	Unrealized Gain (Loss) on						Cumulative
	Available-for-sale Securities		Foreign Currency Forward Contracts		Forward Starting Interest Rate Swaps		Foreign Currency Translation Adjustment		Total
Balance at November 2, 2019	$	152	$	925	$	(13,686)	$	(9,475)	$	(22,084)
Other comprehensive loss before reclassifications	69		(4,515)		(12,507)		(6,321)		(23,274)
Amounts reclassified from AOCI	—		2,742		2,427		—		5,169
Balance at August 1, 2020	$	221	$	(848)	$	(23,766)	$	(15,796)	$	(40,189)

All amounts reclassified from AOCI related to settlement (gains) losses on foreign currency forward contracts designated as cash flow hedges impacted research and development expense on the Condensed Consolidated Statements of Operations. All

amounts reclassified from AOCI related to settlement (gains) losses on forward starting interest rate swaps designated as cash flow hedges impacted interest and other income (loss), net, on the Condensed Consolidated Statements of Operations.

LEASES

9 Months Ended

Jul. 31, 2021

Leases [Abstract]

LEASES

Ciena leases over 1.3 million square feet of facilities globally. Ciena’s principal executive offices are located in Hanover, Maryland. Ciena’s largest facilities are research and development centers located in Ottawa, Canada and Gurgaon, India. Ciena also has engineering and/or service delivery facilities located in San Jose, California; Alpharetta, Georgia; Quebec, Canada; and Pune and Bangalore, India. In addition, Ciena leases various smaller offices in regions throughout the world to support sales and services operations. Office facilities are leased under various non-cancelable operating or finance leases. Ciena's current leases have remaining terms that vary up to 11 years. Certain leases provide for options to extend up to ten years and/or options to terminate within five years.

Leases included in the Condensed Consolidated Balance Sheets were as follows (in thousands):


	Classification	As of July 31, 2021		As of October 31, 2020
Operating leases:
Operating ROU assets	Operating right-of-use assets	$	48,937	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	70,320		80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	75,616	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(22,664)		(17,837)
Buildings, net		$	52,952	$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	66,530	$	64,401

ROU assets that involve subleased or vacant space aggregate to $4.3 million as of July 31, 2021. These assets may become impaired if tenants are unable to service their obligations under the sublease, and/or if the estimates as to occupancy are not realized, either of which may be more likely as COVID-19 impacts evolve.

The components of lease expense included in the Condensed Consolidated Statement of Operations were as follows (in thousands):


		Quarter Ended				Nine Months Ended
		July 31,		August 1,		July 31,		August 1,
	Classification	2021		2020		2021		2020
Operating lease costs	Operating expense	$	4,085	$	4,234	$	12,516	$	13,435
Finance lease cost:
Amortization of finance ROU asset	Operating expense	1,224		1,097		3,580		3,330
Interest on finance lease liabilities	Interest expense	1,243		1,162		3,671		3,574
Total finance lease cost		2,467		2,259		7,251		6,904
Non-capitalized lease cost	Operating expense	216		883		842		2,211
Variable lease cost(1)	Operating expense	1,393		1,265		4,444		3,900

Net lease cost(2)		$	8,161	$	8,641	$	25,053	$	26,450

(1) Variable lease costs include expenses relating to insurance, taxes, maintenance and other costs required by the applicable operating lease. Variable lease costs are determined by whether they are to be included in base rent and if amounts are based on a consumer price index.

(2) Excludes other operating expense of $2.3 million and $2.2 million for the third quarter of fiscal 2021 and 2020, respectively and $7.2 million and $8.7 million for the nine months ended July 31, 2021 and August 1, 2020, respectively, related to amortization of leasehold improvements.

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of July 31, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	5,472	$	8,146	$	13,618
2022	19,862		8,500		28,362
2023	16,087		8,500		24,587
2024	13,768		8,620		22,388
2025	9,437		8,706		18,143
Thereafter	10,272		55,532		65,804
Total lease payments	74,898		98,004		172,902
Less: Imputed interest	(4,578)		(31,474)		(36,052)
Present value of lease liabilities	70,320		66,530		136,850
Less: Current portion of present value of minimum lease payments	(19,085)		(3,395)		(22,480)
Long-term portion of present value of minimum lease payments	$	51,235	$	63,135	$	114,370

The weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows:


	As of July 31, 2021		As of October 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4.35		4.87
Finance leases	10.97		11.71
Weighted-average discount rates:
Operating leases	2.75	%	2.82	%
Finance leases	7.56	%	7.56	%

LEASES

Leases included in the Condensed Consolidated Balance Sheets were as follows (in thousands):


	Classification	As of July 31, 2021		As of October 31, 2020
Operating leases:
Operating ROU assets	Operating right-of-use assets	$	48,937	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	70,320		80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	75,616	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(22,664)		(17,837)
Buildings, net		$	52,952	$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	66,530	$	64,401

The components of lease expense included in the Condensed Consolidated Statement of Operations were as follows (in thousands):


		Quarter Ended				Nine Months Ended
		July 31,		August 1,		July 31,		August 1,
	Classification	2021		2020		2021		2020
Operating lease costs	Operating expense	$	4,085	$	4,234	$	12,516	$	13,435
Finance lease cost:
Amortization of finance ROU asset	Operating expense	1,224		1,097		3,580		3,330
Interest on finance lease liabilities	Interest expense	1,243		1,162		3,671		3,574
Total finance lease cost		2,467		2,259		7,251		6,904
Non-capitalized lease cost	Operating expense	216		883		842		2,211
Variable lease cost(1)	Operating expense	1,393		1,265		4,444		3,900

Net lease cost(2)		$	8,161	$	8,641	$	25,053	$	26,450

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of July 31, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	5,472	$	8,146	$	13,618
2022	19,862		8,500		28,362
2023	16,087		8,500		24,587
2024	13,768		8,620		22,388
2025	9,437		8,706		18,143
Thereafter	10,272		55,532		65,804
Total lease payments	74,898		98,004		172,902
Less: Imputed interest	(4,578)		(31,474)		(36,052)
Present value of lease liabilities	70,320		66,530		136,850
Less: Current portion of present value of minimum lease payments	(19,085)		(3,395)		(22,480)
Long-term portion of present value of minimum lease payments	$	51,235	$	63,135	$	114,370

The weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows:


	As of July 31, 2021		As of October 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4.35		4.87
Finance leases	10.97		11.71
Weighted-average discount rates:
Operating leases	2.75	%	2.82	%
Finance leases	7.56	%	7.56	%

SHORT-TERM AND LONG-TERM DEBT

9 Months Ended

Jul. 31, 2021

Debt Disclosure [Abstract]

SHORT-TERM AND LONG-TERM DEBT

2025 Term Loan

On January 23, 2020, Ciena entered into a Refinancing Amendment to Credit Agreement pursuant to which Ciena refinanced the entire outstanding amount of its then existing senior secured term loan and incurred a new senior secured term loan in an aggregate principal amount of $693.0 million and maturing on September 28, 2025 (the “2025 Term Loan”).

The net carrying value of Ciena’s term loan was comprised of the following for the periods indicated (in thousands):


	July 31, 2021								October 31, 2020
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
2025 Term Loan	$	682,605	$	(1,332)	$	(2,488)	$	678,785	$	683,286

Deferred debt issuance costs that were deducted from the carrying amounts of the term loan totaled $2.5 million as of July 31, 2021 and $2.9 million at October 31, 2020. Deferred debt issuance costs are amortized using the straight-line method, which approximates the effect of the effective interest rate, through the maturity of the term loan. The amortization of deferred debt issuance costs for this term loan is included in interest expense, and was $0.5 million during the first nine months of each of fiscal 2021 and fiscal 2020. The carrying value of the term loan listed above is also net of any unamortized debt discounts.

As of July 31, 2021, the estimated fair value of the 2025 Term Loan was $680.9 million. Ciena’s term loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its term loan using a market approach based on observable inputs, such as current market transactions involving comparable securities.

EARNINGS PER SHARE CALCULATION

9 Months Ended

Jul. 31, 2021

Earnings Per Share [Abstract]

EARNINGS PER SHARE CALCULATION

The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Net income	$	238,232	$	142,267	$	396,697	$	296,250
Basic weighted average shares outstanding	155,271		154,184		155,277		154,136
Effect of dilutive potential common shares	1,473		2,134		1,465		1,605
Diluted weighted average shares	156,744		156,318		156,742		155,741
Basic EPS	$	1.53	$	0.92	$	2.55	$	1.92
Diluted EPS	$	1.52	$	0.91	$	2.53	$	1.90
Antidilutive employee share-based awards, excluded	131		13		99		316

Basic net income per common share (“Basic EPS”) is computed using the weighted average number of common shares outstanding. Diluted net income per potential common share (“Diluted EPS”) is computed using the weighted average number of the following, in each case, to the extent the effect is not anti-dilutive: (i) common shares outstanding; (ii) shares issuable upon vesting of stock unit awards; and (iii) shares issuable under Ciena’s employee stock purchase plan and upon exercise of outstanding stock options, using the treasury stock method.

STOCKHOLDERS’ EQUITY

9 Months Ended

Jul. 31, 2021

Equity [Abstract]

STOCKHOLDERS’ EQUITY

Stock Repurchase Program

On December 13, 2018, Ciena announced that its Board of Directors authorized a program to repurchase up to $500 million of Ciena’s common stock. After temporarily suspending repurchases of Ciena’s common stock during fiscal 2020, Ciena reinstituted its stock repurchase program in the first quarter of 2021. The amount and timing of repurchases are subject to a variety of factors including liquidity, cash flow, stock price and general business and market conditions. The program may be modified, suspended, or discontinued at any time.

The following table summarizes activity of the stock repurchase program, reported based on trade date:


	Shares Repurchased	Weighted-Average Price per Share		Amount Repurchased (in thousands)
Cumulative balance at October 31, 2020	5,710,912	$	39.33	$	224,611
Repurchase of common stock under the stock repurchase program	1,203,439	54.31		65,356
Cumulative balance at July 31, 2021	6,914,351	$	41.94	$	289,967

The purchase price for the shares of Ciena’s stock repurchased is reflected as a reduction of common stock and additional paid-in capital.

Stock Repurchases Related to Stock Unit Award Tax Withholdings

Ciena repurchases shares of common stock to satisfy employee tax withholding obligations due on vesting of stock unit awards. The purchase price of $36.5 million for the shares of Ciena’s stock repurchased during the first nine months of fiscal 2021 is reflected as a reduction to stockholders’ equity. Ciena is required to allocate the purchase price of the repurchased shares as a reduction of common stock and additional paid-in capital.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 18
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 16
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

SHARE-BASED COMPENSATION EXPENSE

9 Months Ended

Jul. 31, 2021

Share-based Payment Arrangement [Abstract]

SHARE-BASED COMPENSATION EXPENSE

SHARE-BASED COMPENSATION EXPENSEAmended and Restated ESPP

Ciena makes shares of its common stock available for purchase under its Amended and Restated Ciena Corporation Employee Stock Purchase Plan (the “ESPP”). Under the ESPP, eligible employees may enroll in a twelve-month offer period that begins in December and June of each year. Each offer period includes two six-month purchase periods. Employees may purchase a limited number of shares of Ciena common stock at 85% of the fair market value on either the day immediately preceding the offer date or the purchase date, whichever is lower. The ESPP is considered compensatory for purposes of share-based compensation expense. On January 29, 2021, Ciena’s Board of Directors adopted an amendment and restatement of the ESPP to increase the number of shares available for issuance thereunder by 8.7 million and eliminate the evergreen mechanism thereunder, which became effective upon its approval by Ciena’s stockholders on April 1, 2021. Unless earlier terminated, the ESPP will terminate on April 1, 2031.

The following table summarizes share-based compensation expense for the periods indicated (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Product	$	1,037	$	960	$	2,488	$	2,458
Service	1,315		1,007		3,941		2,885
Share-based compensation expense included in cost of goods sold	2,352		1,967		6,429		5,343
Research and development	5,541		4,286		16,179		12,957
Sales and marketing	6,534		5,180		18,960		15,057
General and administrative	8,237		5,940		21,338		17,442

Share-based compensation expense included in operating expense	20,312		15,406		56,477		45,456
Share-based compensation expense capitalized in inventory, net	(193)		(114)		64		39
Total share-based compensation	$	22,471	$	17,259	$	62,970	$	50,838

As of July 31, 2021, total unrecognized share-based compensation expense was approximately $160.6 million, which relates to unvested stock unit awards and is expected to be recognized over a weighted-average period of 1.58 years.

SEGMENTS AND ENTITY-WIDE DISCLOSURES

9 Months Ended

Jul. 31, 2021

Segment Reporting [Abstract]

SEGMENTS AND ENTITY-WIDE DISCLOSURES

Segment Reporting

Ciena has the following operating segments for reporting purposes: (i) Networking Platforms; (ii) Platform Software and Services; (iii) Blue Planet Automation Software and Services; and (iv) Global Services.

Ciena's long-lived assets, including equipment, building, furniture and fixtures, ROU assets, finite-lived intangible assets and maintenance spares, are not reviewed by Ciena's chief operating decision maker for purposes of evaluating performance and allocating resources. As of July 31, 2021, equipment, building, furniture and fixtures, net, totaled $288.9 million, and operating ROU assets totaled $48.9 million both of which support asset groups within Ciena’s four operating segments and unallocated selling and general and administrative activities. As of July 31, 2021, finite-lived intangible assets, goodwill and maintenance spares are assigned to asset groups within the following segments (in thousands):



	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total

Other intangible assets, net	$	9,865	$	—	$	64,109	$	—	$	73,974
Goodwill	$	66,329	$	156,191	$	89,049	$	—	$	311,569
Maintenance spares, net	$	—	$	—	$	—	$	61,048	$	61,048

Segment Profit (Loss)

Segment profit (loss) is determined based on internal performance measures used by Ciena’s chief executive officer to assess the performance of each operating segment in a given period. In connection with that assessment, the chief executive

officer excludes the following items: selling and marketing costs; general and administrative costs; significant asset impairments and restructuring costs; amortization of intangible assets; acquisition and integration costs (recoveries); interest and other income (loss), net; interest expense; loss on extinguishment and modification of debt and provision (benefit) for income taxes.

The table below sets forth Ciena’s segment profit (loss) and the reconciliation to consolidated net income for the periods indicated (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Segment profit (loss):
Networking Platforms	$	244,535	$	262,801	$	612,378	$	642,057
Platform Software and Services	31,526		24,299		95,692		74,918
Blue Planet Automation Software and Services	(3,243)		(5,316)		11		(12,828)
Global Services	55,507		52,676		147,567		151,744
Total segment profit	328,325		334,460		855,648		855,891
Less: Non-performance operating expenses
Selling and marketing	114,924		94,763		322,589		303,043
General and administrative	48,863		41,635		132,491		126,133
Significant asset impairments and restructuring costs	9,789		6,515		23,865		14,798
Amortization of intangible assets	5,967		5,840		17,896		17,532
Acquisition and integration costs (recoveries)	259		(2,329)		860		904

Add: Other non-performance financial items
Interest expense and other income (loss), net	(6,981)		(7,019)		(24,521)		(22,713)
Loss on extinguishment and modification of debt	—		—		—		(646)
Less: Provision (benefit) for income taxes	(96,690)		38,750		(63,271)		73,872
Consolidated net income	$	238,232	$	142,267	$	396,697	$	296,250

Entity-Wide Reporting

The following table reflects Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and operating ROU assets, with any country accounting for at least 10% of total equipment, building, furniture and fixtures, net, and operating ROU assets specifically identified. Equipment, building, furniture and fixtures, net, and operating ROU assets attributable to geographic regions outside of the U.S. and Canada are reflected as “Other International.” For the periods below, Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and operating ROU assets was as follows (in thousands):


	July 31, 2021		October 31, 2020
Canada	$	242,495	$	214,188
United States	54,050		65,321
Other International	41,329		49,894
Total	$	337,874	$	329,403

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8657-108599

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI http://asc.fasb.org/topic&trid=2134510

+ Details

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Jul. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Canadian Grant During fiscal 2018, Ciena entered into agreements related to the Evolution of Networking Services through a Corridor in Quebec and Ontario for Research and Innovation (“ENCQOR”) project with the Canadian federal government, the government of the province of Ontario and the government of the province of Quebec to develop a 5G technology corridor between Quebec and Ontario to promote research and development, small business enterprises and entrepreneurs in Canada. Under these agreements, Ciena can receive up to an aggregate CAD$57.6 million (approximately $46.2 million) in reimbursement from the three Canadian government entities for eligible costs over a period commencing on February 20, 2017 and ending on March 31, 2022. Ciena anticipates receiving recurring disbursements over this period. Amounts received under the agreements are subject to recoupment in the event that Ciena fails to achieve certain minimum investment, employment and project milestones. As of July 31, 2021, Ciena has recorded CAD$48.6 million (approximately $39.0 million) in cumulative benefits as a reduction in research and development expense of which CAD$8.0 million ($6.3 million) was recorded in the first nine months of fiscal 2021. As of July 31, 2021, amounts receivable from this grant were CAD$5.8 million ($4.7 million). Tax Contingencies Ciena is subject to various tax liabilities arising in the ordinary course of business. Ciena does not expect that the ultimate settlement of these tax liabilities will have a material effect on its results of operations, financial position or cash flows. Litigation Ciena is subject to various legal proceedings, claims and other matters arising in the ordinary course of business, including those that relate to employment, commercial, tax and other regulatory matters. Ciena is also subject to intellectual property related claims, including claims against third parties that may involve contractual indemnification obligations on the part of Ciena. Ciena does not expect that the ultimate costs to resolve such matters will have a material effect on its results of operations, financial position or cash flows.

SUBSEQUENT EVENTS	9 Months Ended
SUBSEQUENT EVENTS	Jul. 31, 2021
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Stock Repurchase Program From the end of the third quarter of fiscal 2021 through September 3, 2021, Ciena repurchased an additional 176,815 shares of its common stock, for an aggregate purchase price of $10.0 million at an average price of $56.57 per share, inclusive of repurchases pending settlement. As of September 3, 2021, Ciena has repurchased an aggregate of 7,091,166 shares and has an aggregate of $200.0 million of authorized funds remaining under its stock repurchase program. Vyatta Routing and Switching Technology Acquisition On August 31, 2021, Ciena entered into a definitive agreement with AT&T to acquire its Vyatta virtual routing and switching technology. The acquisition reflects Ciena’s continued investment in its Routing and Switching solutions roadmap and resources. Ciena plans to integrate the engineering personnel to be hired through this transaction into its Routing and Switching research and development (R&D) organization.

SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jul. 31, 2021
Accounting Policies [Abstract]
Newly Issued Accounting Standards - Effective and Not Yet Effective	Newly Issued Accounting Standards - Effective In June 2016, the Financial Accounting Standards Board (the ”FASB”) issued Accounting Standards Update No. 2016-13 (“ASU 2016-13”), Financial Instruments - Credit Losses, which requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Ciena adopted ASU 2016-13 on a modified retrospective basis in the first quarter of fiscal year 2021 through a cumulative-effect adjustment at the beginning of the period of adoption and did not restate prior periods. The standard primarily impacts the value of Ciena’s accounts receivable, net and contract assets, net. Adoption of ASU 2016-13 did not have a material effect on Ciena’s financial position or results of operations. Ciena’s significant accounting policies updated as a result of adopting this standard are as follows: Allowance for Credit Losses for Accounts Receivable and Contract Assets Ciena estimates its allowances for credit losses using relevant available information from internal and external sources, related to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. When assessing for credit losses, Ciena determines collectability by pooling assets with similar characteristics. The allowances for credit losses are each measured on a collective basis when similar risk characteristics exist. The allowances for credit losses are each measured by multiplying the exposure probability of default (the probability the asset will default within a given time frame) by the loss given default rate (the percentage of the asset not expected to be collected due to default) based on the pool of assets. Probability of default rates are published by third-party credit rating agencies. Adjustments to Ciena’s exposure probability may take into account a number of factors, including, but not limited to, various customer-specific factors, the potential sovereign risk of the geographic locations in which the customer is operating and macroeconomic conditions. These factors are updated regularly or when facts and circumstances indicate that an update is deemed necessary. Newly Issued Accounting Standards - Not Yet Effective In March 2020, the FASB issued ASU No. 2020-04 (“ASU 2020-04”), Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. ASU 2020-04 provides temporary optional guidance on contract modifications and hedging accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) to alternative reference rates. In January 2021, the FASB issued ASU 2021-01, which refines the scope of Topic 848 and clarifies some of its guidance as part of the FASB’s monitoring of global reference rate activities. The new guidance was effective upon issuance, and Ciena is allowed to elect to apply the amendments prospectively through December 31, 2022. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures. In December 2019, the FASB issued ASU No. 2019-12 (“ASU 2019-12”), Income Taxes (ASC 740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in ASC 740. The amendments also improve consistent application of and simplify GAAP for other areas of ASC 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for Ciena beginning in the first quarter of fiscal year 2022, and early adoption is permitted. Most amendments within this standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. Ciena is currently evaluating the impact of this accounting standard update on its consolidated financial statements and related disclosures.

REVENUE (Tables)

9 Months Ended

Jul. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The tables below set forth Ciena’s disaggregated revenue for the respective periods (in thousands):


	Quarter Ended July 31, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	712,906	$	—	$	—	$	—	$	712,906
Routing and Switching	69,698		—		—		—		69,698
Platform Software and Services	—		56,945		—		—		56,945
Blue Planet Automation Software and Services	—		—		16,607		—		16,607
Maintenance Support and Training	—		—		—		74,006		74,006
Installation and Deployment	—		—		—		46,653		46,653
Consulting and Network Design	—		—		—		11,326		11,326
Total revenue by product line	$	782,604	$	56,945	$	16,607	$	131,985	$	988,141

Timing of revenue recognition:
Products and services at a point in time	$	782,604	$	17,928	$	4,558	$	6,508	$	811,598
Services transferred over time	—		39,017		12,049		125,477		176,543
Total revenue by timing of revenue recognition	$	782,604	$	56,945	$	16,607	$	131,985	$	988,141


	Quarter Ended August 1, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	722,512	$	—	$	—	$	—	$	722,512
Routing and Switching	79,756		—		—		—		79,756
Platform Software and Services	—		46,422		—		—		46,422
Blue Planet Automation Software and Services	—		—		11,297		—		11,297
Maintenance Support and Training	—		—		—		69,099		69,099
Installation and Deployment	—		—		—		39,798		39,798
Consulting and Network Design	—		—		—		7,828		7,828
Total revenue by product line	$	802,268	$	46,422	$	11,297	$	116,725	$	976,712

Timing of revenue recognition:
Products and services at a point in time	$	802,268	$	15,838	$	410	$	3,300	$	821,816
Services transferred over time	—		30,584		10,887		113,425		154,896
Total revenue by timing of revenue recognition	$	802,268	$	46,422	$	11,297	$	116,725	$	976,712


	Nine Months Ended July 31, 2021
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	1,798,888	$	—	$	—	$	—	$	1,798,888
Routing and Switching	197,632		—		—		—		197,632
Platform Software and Services	—		163,472		—		—		163,472
Blue Planet Automation Software and Services	—		—		57,499		—		57,499
Maintenance Support and Training	—		—		—		212,054		212,054
Installation and Deployment	—		—		—		124,263		124,263
Consulting and Network Design	—		—		—		25,390		25,390
Total revenue by product line	$	1,996,520	$	163,472	$	57,499	$	361,707	$	2,579,198

Timing of revenue recognition:
Products and services at a point in time	$	1,996,520	$	54,756	$	20,497	$	9,776	$	2,081,549
Services transferred over time	—		108,716		37,002		351,931		497,649
Total revenue by timing of revenue recognition	$	1,996,520	$	163,472	$	57,499	$	361,707	$	2,579,198


	Nine Months Ended August 1, 2020
	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total
Product lines:
Converged Packet Optical	$	1,968,355	$	—	$	—	$	—	$	1,968,355
Routing Switching	211,432		—		—		—		211,432
Platform Software and Services	—		143,295		—		—		143,295
Blue Planet Automation Software and Services	—		—		41,779		—		41,779
Maintenance Support and Training	—		—		—		202,370		202,370
Installation and Deployment	—		—		—		108,994		108,994
Consulting and Network Design	—		—		—		27,452		27,452
Total revenue by product line	$	2,179,787	$	143,295	$	41,779	$	338,816	$	2,703,677

Timing of revenue recognition:
Products and services at a point in time	$	2,179,787	$	45,930	$	8,891	$	12,174	$	2,246,782
Services transferred over time	—		97,365		32,888		326,642		456,895
Total revenue by timing of revenue recognition	$	2,179,787	$	143,295	$	41,779	$	338,816	$	2,703,677

For the periods below, Ciena’s geographic distribution of revenue was as follows (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Geographic distribution:
Americas	$	692,853	$	713,340	$	1,776,939	$	1,937,725
EMEA	189,180		162,465		499,652		433,861
APAC	106,108		100,907		302,607		332,091
Total revenue by geographic distribution	$	988,141	$	976,712	$	2,579,198	$	2,703,677

For the periods below, the only customers that accounted for at least 10% of Ciena’s revenue were as follows (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Verizon	$	131,892	n/a		n/a		$	272,200
Web-scale provider	119,728		n/a		n/a		n/a
AT&T	119,199		114,963		313,140		304,645
Total	$	370,819	$	114,963	$	313,140	$	576,845


n/a			Denotes revenue representing less than 10% of total revenue for the period

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):


	Balance at July 31, 2021		Balance at October 31, 2020
Accounts receivable, net	$	878,229	$	719,405
Contract assets for unbilled accounts receivable, net	$	98,812	$	85,843
Deferred revenue	$	183,899	$	158,363

As of the dates indicated, deferred revenue is comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Products	$	13,380	$	17,534
Services	170,519		140,829
	183,899		158,363
Less current portion	(126,179)		(108,700)
Long-term deferred revenue	$	57,720	$	49,663

CANADIAN EMERGENCY WAGE SUBSIDY (Tables)

9 Months Ended

Jul. 31, 2021

Unusual or Infrequent Items, or Both [Abstract]

Schedule of Canadian Emergency Wage Subsidy

The following table summarizes CEWS for the periods indicated (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Product	$	94	$	—	$	4,283	$	—
Service	47		—		2,667		—
CEWS benefit in cost of goods sold	141		—		6,950		—
Research and development	596		—		29,519		—
Sales and marketing	53		—		2,604		—
General and administrative	46		—		2,207		—
CEWS benefit in operating expense	695		—		34,330		—
Total CEWS benefit	$	836	$	—	$	41,280	$	—

RESTRUCTURING COSTS (Tables)

9 Months Ended

Jul. 31, 2021

Restructuring and Related Activities [Abstract]

Schedule of Activity and Balance of the Restructuring Liability Accounts

The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in Accrued liabilities and other short-term obligations on Ciena’s Condensed Consolidated Balance Sheets, for the nine months ended July 31, 2021 (in thousands):


	Workforce reduction			Other restructuring activities			Total
Balance at October 31, 2020	$	2,915		$	—		$	2,915
Charges	5,306		(1)	18,558		(2)	23,864

Cash payments	(7,051)			(18,558)			(25,609)
Balance at July 31, 2021	$	1,170		$	—		$	1,170
Current restructuring liabilities	$	1,170		$	—		$	1,170

(2) Primarily represents the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization, and costs related to restructured facilities.


	Workforce reduction			Other restructuring activities			Total
Balance at November 2, 2019	$	3,983		$	11,160		$	15,143
Charges	5,015		(1)	9,783		(2)	14,798

Adjustments related to ASC 842	—			(11,160)		(3)	(11,160)
Cash payments	(7,335)			(9,783)			(17,118)
Balance at August 1, 2020	$	1,663		$	—		$	1,663
Current restructuring liabilities	$	1,663		$	—		$	1,663

(2) Primarily represents variable costs and imputed interest expense related to restructured facilities.

(3) Represents restructuring reserve liability recognized as a reduction to Operating right-of-use (“ROU”) assets, net in relation to adoption of ASC 842.

INTEREST AND OTHER INCOME (LOSS), NET (Tables)

9 Months Ended

Jul. 31, 2021

Other Income and Expenses [Abstract]

Interest and Other Income (Loss), Net

The components of interest and other income (loss), net, are as follows (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Interest income	$	465	$	849	$	1,553	$	6,262

Gains (losses) on non-hedge designated foreign currency forward contracts	(4,414)		1,282		5,295		3,005
Foreign currency exchange gains (losses)	4,959		(2,537)		(8,534)		(7,376)

Other	(215)		638		86		(678)
Interest and other income (loss), net	$	795	$	232	$	(1,600)	$	1,213

SHORT-TERM AND LONG-TERM INVESTMENTS (Tables)

9 Months Ended

Jul. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Short-Term and Long-Term Investments

As of the dates indicated, investments are comprised of the following (in thousands):


	July 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	181,966	$	44	$	—	$	182,010
Included in long-term investments	60,887		7		(6)		60,888
	$	242,853	$	51	$	(6)	$	242,898


	October 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. government obligations:
Included in short-term investments	$	150,559	$	109	$	(1)	$	150,667
Included in long-term investments	82,252		—		(26)		82,226
	$	232,811	$	109	$	(27)	$	232,893

Schedule of Legal Maturities of Debt Investments

The following table summarizes the final legal maturities of debt investments at July 31, 2021 (in thousands):


	Amortized Cost		Estimated Fair Value
Less than one year	$	181,966	$	182,010
Due in 1-2 years	60,887		60,888
	$	242,853	$	242,898

FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Jul. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of the Fair Value of Assets and Liabilities Recorded on a Recurring Basis

As of the date indicated, the following table summarizes the assets and liabilities that are recorded at fair value on a recurring basis (in thousands):


	July 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	909,976	$	—	$	—	$	909,976
Bond mutual fund	75,398		—		—		75,398
Time deposits	30,029		—		—		30,029
Deferred compensation plan assets	12,380		—		—		12,380
U.S. government obligations	—		242,898		—		242,898

Foreign currency forward contracts	—		8,598		—		8,598

Total assets measured at fair value	$	1,027,783	$	251,496	$	—	$	1,279,279

Liabilities:
Foreign currency forward contracts	$	—	$	3,709	$	—	$	3,709
Forward starting interest rate swaps	—		20,682		—		20,682

Total liabilities measured at fair value	$	—	$	24,391	$	—	$	24,391


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	889,293	$	—	$	—	$	889,293
Bond mutual fund	50,361		—		—		50,361
Deferred compensation plan assets	8,213		—		—		8,213
U.S. government obligations	—		232,893		—		232,893

Foreign currency forward contracts	—		82		—		82

Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Foreign currency forward contracts	$	—	$	681	$	—	$	681

Forward starting interest rate swaps	—		28,513		—		28,513

Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194

Schedule of Assets and Liabilities as Presented on Ciena's Condensed Consolidated Balance Sheets

As of the date indicated, the assets and liabilities above are presented on Ciena’s Condensed Consolidated Balance Sheets as follows (in thousands):


	July 31, 2021
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	1,015,403	$	—	$	—	$	1,015,403
Short-term investments	—		182,010		—		182,010
Prepaid expenses and other	—		8,598		—		8,598
Long-term investments	—		60,888		—		60,888
Other long-term assets	12,380		—		—		12,380
Total assets measured at fair value	$	1,027,783	$	251,496	$	—	$	1,279,279

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	3,709	$	—	$	3,709
Other long-term obligations	—		20,682		—		20,682
Total liabilities measured at fair value	$	—	$	24,391	$	—	$	24,391


	October 31, 2020
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	939,654	$	—	$	—	$	939,654
Short-term investments	—		150,667		—		150,667
Prepaid expenses and other	—		82		—		82

Other long-term assets	8,213		82,226		—		90,439
Total assets measured at fair value	$	947,867	$	232,975	$	—	$	1,180,842

Liabilities:
Accrued liabilities and other short-term obligations	$	—	$	681	$	—	$	681

Other long-term obligations	—		28,513		—		28,513
Total liabilities measured at fair value	$	—	$	29,194	$	—	$	29,194

INVENTORIES (Tables)

9 Months Ended

Jul. 31, 2021

Inventory Disclosure [Abstract]

Schedule of Inventories

As of the dates indicated, inventories are comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Raw materials	$	139,338	$	119,481
Work-in-process	10,556		13,738
Finished goods	204,580		210,050
Deferred cost of goods sold	53,826		40,747
Gross inventories	408,300		384,016
Provision for excess and obsolescence	(38,130)		(39,637)
Inventories, net	$	370,170	$	344,379

PREPAID EXPENSES AND OTHER (Tables)

9 Months Ended

Jul. 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid Expenses and Other

As of the dates indicated, prepaid expenses and other are comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Contract assets for unbilled accounts receivable, net	$	98,812	$	85,843
Prepaid expenses	75,287		70,647
Prepaid VAT and other taxes	70,735		72,838
Product demonstration equipment, net	35,411		44,793
Other non-trade receivables	17,808		21,981
Capitalized contract acquisition costs	15,067		11,296
Derivative assets	8,598		82
CEWS receivable	1,229		—
Deferred deployment expense	336		604
	$	323,283	$	308,084

OTHER BALANCE SHEET DETAILS (Tables)

9 Months Ended

Jul. 31, 2021

Balance Sheet Related Disclosures [Abstract]

Schedule of Accrued Liabilities

As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Compensation, payroll related tax and benefits	$	142,713	$	135,462
Warranty	48,139		49,868
Income taxes payable	36,526		6,348
Vacation	30,986		26,945



Finance lease obligations	3,395		2,836

Other	111,532		112,673
	$	373,291	$	334,132

Schedule of Accrued Warranties

The following table summarizes the activity in Ciena’s accrued warranty for the periods indicated (in thousands):


	Beginning Balance		Current Period Provisions	Settlements	Ending Balance
Nine Months Ended August 1, 2020	$	48,498	19,172	(15,504)	$	52,166
Nine Months Ended July 31, 2021	$	49,868	12,726	(14,455)	$	48,139

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities (deferred revenue) from contracts with customers (in thousands):


	Balance at July 31, 2021		Balance at October 31, 2020
Accounts receivable, net	$	878,229	$	719,405
Contract assets for unbilled accounts receivable, net	$	98,812	$	85,843
Deferred revenue	$	183,899	$	158,363

As of the dates indicated, deferred revenue is comprised of the following (in thousands):


	July 31, 2021		October 31, 2020
Products	$	13,380	$	17,534
Services	170,519		140,829
	183,899		158,363
Less current portion	(126,179)		(108,700)
Long-term deferred revenue	$	57,720	$	49,663

ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)

9 Months Ended

Jul. 31, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income

The following table summarizes the changes in accumulated balances of other comprehensive income (“AOCI”), net of tax, for the nine months ended July 31, 2021 (in thousands):


	Unrealized Gain (Loss) on						Cumulative
	Available-for-sale Securities		Foreign Currency Forward Contracts		Forward Starting Interest Rate Swaps		Foreign Currency Translation Adjustment		Total
Balance at October 31, 2020	$	45	$	(219)	$	(21,535)	$	(13,649)	$	(35,358)
Other comprehensive gain (loss) before reclassifications	(28)		13,574		(1,399)		19,439		31,586
Amounts reclassified from AOCI	—		(7,907)		7,049		—		(858)
Balance at July 31, 2021	$	17	$	5,448	$	(15,885)	$	5,790	$	(4,630)

The following table summarizes the changes in AOCI, net of tax, for the nine months ended August 1, 2020 (in thousands):


	Unrealized Gain (Loss) on						Cumulative
	Available-for-sale Securities		Foreign Currency Forward Contracts		Forward Starting Interest Rate Swaps		Foreign Currency Translation Adjustment		Total
Balance at November 2, 2019	$	152	$	925	$	(13,686)	$	(9,475)	$	(22,084)
Other comprehensive loss before reclassifications	69		(4,515)		(12,507)		(6,321)		(23,274)
Amounts reclassified from AOCI	—		2,742		2,427		—		5,169
Balance at August 1, 2020	$	221	$	(848)	$	(23,766)	$	(15,796)	$	(40,189)

LEASES (Tables)

9 Months Ended

Jul. 31, 2021

Leases [Abstract]

Leases Included in the Balance Sheet

Leases included in the Condensed Consolidated Balance Sheets were as follows (in thousands):


	Classification	As of July 31, 2021		As of October 31, 2020
Operating leases:
Operating ROU assets	Operating right-of-use assets	$	48,937	$	57,026
Operating lease liabilities	Operating lease liabilities and Long-term operating lease liabilities	70,320		80,450
Finance leases:
Buildings, gross	Equipment, building, furniture and fixtures, net	$	75,616	$	70,791
Less: accumulated depreciation	Equipment, building, furniture and fixtures, net	(22,664)		(17,837)
Buildings, net		$	52,952	$	52,954
Finance lease liabilities	Accrued liabilities and other short-term obligations and other long-term obligations	$	66,530	$	64,401

The weighted average remaining lease terms and weighted average discount rates for operating and finance leases were as follows:


	As of July 31, 2021		As of October 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4.35		4.87
Finance leases	10.97		11.71
Weighted-average discount rates:
Operating leases	2.75	%	2.82	%
Finance leases	7.56	%	7.56	%

Components of Lease Expense

The components of lease expense included in the Condensed Consolidated Statement of Operations were as follows (in thousands):


		Quarter Ended				Nine Months Ended
		July 31,		August 1,		July 31,		August 1,
	Classification	2021		2020		2021		2020
Operating lease costs	Operating expense	$	4,085	$	4,234	$	12,516	$	13,435
Finance lease cost:
Amortization of finance ROU asset	Operating expense	1,224		1,097		3,580		3,330
Interest on finance lease liabilities	Interest expense	1,243		1,162		3,671		3,574
Total finance lease cost		2,467		2,259		7,251		6,904
Non-capitalized lease cost	Operating expense	216		883		842		2,211
Variable lease cost(1)	Operating expense	1,393		1,265		4,444		3,900

Net lease cost(2)		$	8,161	$	8,641	$	25,053	$	26,450

Lessee, Operating Lease, Liability, Maturity

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of July 31, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	5,472	$	8,146	$	13,618
2022	19,862		8,500		28,362
2023	16,087		8,500		24,587
2024	13,768		8,620		22,388
2025	9,437		8,706		18,143
Thereafter	10,272		55,532		65,804
Total lease payments	74,898		98,004		172,902
Less: Imputed interest	(4,578)		(31,474)		(36,052)
Present value of lease liabilities	70,320		66,530		136,850
Less: Current portion of present value of minimum lease payments	(19,085)		(3,395)		(22,480)
Long-term portion of present value of minimum lease payments	$	51,235	$	63,135	$	114,370

Finance Lease, Liability, Maturity

Future minimum lease payments and the present value of minimum lease payments related to operating and finance leases as of July 31, 2021 were as follows (in thousands):


	Operating Leases		Finance Leases		Total
Remaining fiscal 2021	$	5,472	$	8,146	$	13,618
2022	19,862		8,500		28,362
2023	16,087		8,500		24,587
2024	13,768		8,620		22,388
2025	9,437		8,706		18,143
Thereafter	10,272		55,532		65,804
Total lease payments	74,898		98,004		172,902
Less: Imputed interest	(4,578)		(31,474)		(36,052)
Present value of lease liabilities	70,320		66,530		136,850
Less: Current portion of present value of minimum lease payments	(19,085)		(3,395)		(22,480)
Long-term portion of present value of minimum lease payments	$	51,235	$	63,135	$	114,370

SHORT-TERM AND LONG-TERM DEBT (Tables)

9 Months Ended

Jul. 31, 2021

Debt Disclosure [Abstract]

Schedule of Carrying Values and Estimated Fair Values of Convertible Notes

The net carrying value of Ciena’s term loan was comprised of the following for the periods indicated (in thousands):


	July 31, 2021								October 31, 2020
	Principal Balance		Unamortized Discount		Deferred Debt Issuance Costs		Net Carrying Value		Net Carrying Value
2025 Term Loan	$	682,605	$	(1,332)	$	(2,488)	$	678,785	$	683,286

EARNINGS PER SHARE CALCULATION (Tables)

9 Months Ended

Jul. 31, 2021

Earnings Per Share [Abstract]

Schedule of Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share

The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Net income	$	238,232	$	142,267	$	396,697	$	296,250
Basic weighted average shares outstanding	155,271		154,184		155,277		154,136
Effect of dilutive potential common shares	1,473		2,134		1,465		1,605
Diluted weighted average shares	156,744		156,318		156,742		155,741
Basic EPS	$	1.53	$	0.92	$	2.55	$	1.92
Diluted EPS	$	1.52	$	0.91	$	2.53	$	1.90
Antidilutive employee share-based awards, excluded	131		13		99		316

STOCKHOLDERS’ EQUITY (Tables)

9 Months Ended

Jul. 31, 2021

Equity [Abstract]

Schedule of Stock Repurchase Program

The following table summarizes activity of the stock repurchase program, reported based on trade date:


	Shares Repurchased	Weighted-Average Price per Share		Amount Repurchased (in thousands)
Cumulative balance at October 31, 2020	5,710,912	$	39.33	$	224,611
Repurchase of common stock under the stock repurchase program	1,203,439	54.31		65,356
Cumulative balance at July 31, 2021	6,914,351	$	41.94	$	289,967

SHARE-BASED COMPENSATION EXPENSE (Tables)

9 Months Ended

Jul. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Expense

The following table summarizes share-based compensation expense for the periods indicated (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Product	$	1,037	$	960	$	2,488	$	2,458
Service	1,315		1,007		3,941		2,885
Share-based compensation expense included in cost of goods sold	2,352		1,967		6,429		5,343
Research and development	5,541		4,286		16,179		12,957
Sales and marketing	6,534		5,180		18,960		15,057
General and administrative	8,237		5,940		21,338		17,442

Share-based compensation expense included in operating expense	20,312		15,406		56,477		45,456
Share-based compensation expense capitalized in inventory, net	(193)		(114)		64		39
Total share-based compensation	$	22,471	$	17,259	$	62,970	$	50,838

SEGMENTS AND ENTITY-WIDE DISCLOSURES (Tables)

9 Months Ended

Jul. 31, 2021

Segment Reporting [Abstract]

Reconciliation of Assets From Segment to Consolidated

As of July 31, 2021, finite-lived intangible assets, goodwill and maintenance spares are assigned to asset groups within the following segments (in thousands):



	Networking Platforms		Platform Software and Services		Blue Planet Automation Software and Services		Global Services		Total

Other intangible assets, net	$	9,865	$	—	$	64,109	$	—	$	73,974
Goodwill	$	66,329	$	156,191	$	89,049	$	—	$	311,569
Maintenance spares, net	$	—	$	—	$	—	$	61,048	$	61,048

Schedule of Segment Profit (Loss) and the Reconciliation to Consolidated Net Income (Loss)

The table below sets forth Ciena’s segment profit (loss) and the reconciliation to consolidated net income for the periods indicated (in thousands):


	Quarter Ended				Nine Months Ended
	July 31,		August 1,		July 31,		August 1,
	2021		2020		2021		2020
Segment profit (loss):
Networking Platforms	$	244,535	$	262,801	$	612,378	$	642,057
Platform Software and Services	31,526		24,299		95,692		74,918
Blue Planet Automation Software and Services	(3,243)		(5,316)		11		(12,828)
Global Services	55,507		52,676		147,567		151,744
Total segment profit	328,325		334,460		855,648		855,891
Less: Non-performance operating expenses
Selling and marketing	114,924		94,763		322,589		303,043
General and administrative	48,863		41,635		132,491		126,133
Significant asset impairments and restructuring costs	9,789		6,515		23,865		14,798
Amortization of intangible assets	5,967		5,840		17,896		17,532
Acquisition and integration costs (recoveries)	259		(2,329)		860		904

Add: Other non-performance financial items
Interest expense and other income (loss), net	(6,981)		(7,019)		(24,521)		(22,713)
Loss on extinguishment and modification of debt	—		—		—		(646)
Less: Provision (benefit) for income taxes	(96,690)		38,750		(63,271)		73,872
Consolidated net income	$	238,232	$	142,267	$	396,697	$	296,250

Schedule of Ciena's Geographic Distribution of Revenue and Long-Lived Assets

For the periods below, Ciena’s geographic distribution of equipment, building, furniture and fixtures, net, and operating ROU assets was as follows (in thousands):


	July 31, 2021		October 31, 2020
Canada	$	242,495	$	214,188
United States	54,050		65,321
Other International	41,329		49,894
Total	$	337,874	$	329,403

REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 988,141	$ 976,712	$ 2,579,198	$ 2,703,677
Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	811,598	821,816	2,081,549	2,246,782
Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	176,543	154,896	497,649	456,895
Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	712,906	722,512	1,798,888	1,968,355
Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	69,698	79,756	197,632	211,432
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	56,945	46,422	163,472	143,295
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	16,607	11,297	57,499	41,779
Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	74,006	69,099	212,054	202,370
Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	46,653	39,798	124,263	108,994
Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	11,326	7,828	25,390	27,452
Networking Platforms
Disaggregation of Revenue [Line Items]
Total revenue	782,604	802,268	1,996,520	2,179,787
Networking Platforms \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	782,604	802,268	1,996,520	2,179,787
Networking Platforms \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	782,604	802,268	1,996,520	2,179,787
Networking Platforms \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	712,906	722,512	1,798,888	1,968,355
Networking Platforms \| Operating Segments \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	69,698	79,756	197,632	211,432
Networking Platforms \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Networking Platforms \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	56,945	46,422	163,472	143,295
Platform Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	17,928	15,838	54,756	45,930
Platform Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	39,017	30,584	108,716	97,365
Platform Software and Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	56,945	46,422	163,472	143,295
Platform Software and Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Operating Segments \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	56,945	46,422	163,472	143,295
Platform Software and Services \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Platform Software and Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	16,607	11,297	57,499	41,779
Blue Planet Automation Software and Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	4,558	410	20,497	8,891
Blue Planet Automation Software and Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	12,049	10,887	37,002	32,888
Blue Planet Automation Software and Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	16,607	11,297	57,499	41,779
Blue Planet Automation Software and Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	16,607	11,297	57,499	41,779
Blue Planet Automation Software and Services \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Blue Planet Automation Software and Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services
Disaggregation of Revenue [Line Items]
Total revenue	131,985	116,725	361,707	338,816
Global Services \| Products and services at a point in time
Disaggregation of Revenue [Line Items]
Total revenue	6,508	3,300	9,776	12,174
Global Services \| Services transferred over time
Disaggregation of Revenue [Line Items]
Total revenue	125,477	113,425	351,931	326,642
Global Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Total revenue	131,985	116,725	361,707	338,816
Global Services \| Operating Segments \| Converged Packet Optical
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services \| Operating Segments \| Routing and Switching
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services \| Operating Segments \| Platform Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services \| Operating Segments \| Blue Planet Automation Software and Services
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Global Services \| Operating Segments \| Maintenance Support and Training
Disaggregation of Revenue [Line Items]
Total revenue	74,006	69,099	212,054	202,370
Global Services \| Operating Segments \| Installation and Deployment
Disaggregation of Revenue [Line Items]
Total revenue	46,653	39,798	124,263	108,994
Global Services \| Operating Segments \| Consulting and Network Design
Disaggregation of Revenue [Line Items]
Total revenue	$ 11,326	$ 7,828	$ 25,390	$ 27,452

REVENUE - Geographical Distribution of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 988,141	$ 976,712	$ 2,579,198	$ 2,703,677
Americas
Disaggregation of Revenue [Line Items]
Total revenue	692,853	713,340	1,776,939	1,937,725
EMEA
Disaggregation of Revenue [Line Items]
Total revenue	189,180	162,465	499,652	433,861
APAC
Disaggregation of Revenue [Line Items]
Total revenue	106,108	100,907	302,607	332,091
United States
Disaggregation of Revenue [Line Items]
Total revenue	$ 623,900	$ 647,000	$ 1,600,000	$ 1,800,000

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 22: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

REVENUE - Revenue by Major Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Revenue, Major Customer [Line Items]
Total revenue	$ 988,141	$ 976,712	$ 2,579,198	$ 2,703,677
Verizon \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	131,892			272,200
Web-scale provider \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	119,728
AT&T \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	119,199	114,963	313,140	304,645
Total \| Customer Concentration Risk
Revenue, Major Customer [Line Items]
Total revenue	$ 370,819	$ 114,963	$ 313,140	$ 576,845

- Definition

+ References

+ Details

REVENUE - Contract Balances (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 878,229	$ 719,405
Contract assets for unbilled accounts receivable, net	98,812	85,843
Deferred revenue	$ 183,899	$ 158,363

REVENUE - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
REVENUE - Narrative (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020	Oct. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenue	$ 988,141	$ 976,712	$ 2,579,198	$ 2,703,677
Revenue recognized that was previously deferred			94,700	91,800
Capitalized contract acquisition costs	20,400		20,400		$ 15,300
Amortization of capitalized contract acquisition costs			16,800	16,200
United States
Disaggregation of Revenue [Line Items]
Total revenue	$ 623,900	$ 647,000	$ 1,600,000	$ 1,800,000

- Definition

+ References

+ Details

REVENUE - Performance Obligation (Details) $ in Millions	Jul. 31, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 1,400.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of remaining performance obligation	85.00%
Period of remaining performance obligation	12 months

CANADIAN EMERGENCY WAGE SUBSIDY - Narrative (Details) $ in Thousands, $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2021 USD ($)	Jul. 31, 2021 CAD ($)	Aug. 01, 2020 USD ($)	Jul. 31, 2021 USD ($)	Jul. 31, 2021 CAD ($)	Aug. 01, 2020 USD ($)	Jul. 31, 2021 CAD ($)
Grants, Canada Emergency Wage Subsidy, 2020 Employee Wages
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	$ 800	$ 1.1		$ 35,200	$ 43.9
Canadian Emergency Wage Subsidy
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	836		$ 0	41,280	$ 52.2	$ 0
Amounts receivable from grant	$ 1,200			$ 1,200			$ 1.5

CANADIAN EMERGENCY WAGE SUBSIDY - Schedule of Canadian Emergency Wage Subsidy (Details) - CEWS receivable $ in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021 USD ($)	Aug. 01, 2020 USD ($)	Jul. 31, 2021 USD ($)	Jul. 31, 2021 CAD ($)	Aug. 01, 2020 USD ($)
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	$ 836	$ 0	$ 41,280	$ 52.2	$ 0
Product
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	94	0	4,283		0
Service
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	47	0	2,667		0
CEWS benefit in cost of goods sold
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	141	0	6,950		0
Research and development
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	596	0	29,519		0
Sales and marketing
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	53	0	2,604		0
General and administrative
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	46	0	2,207		0
CEWS benefit in operating expense
Unusual or Infrequent Item, or Both [Line Items]
Total CEWS benefit	$ 695	$ 0	$ 34,330		$ 0

RESTRUCTURING COSTS (Details) $ in Thousands	9 Months Ended
RESTRUCTURING COSTS (Details) $ in Thousands	Jul. 31, 2021 USD ($) employee	Aug. 01, 2020 USD ($) employee
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 2,915	$ 15,143
Charges	23,864	14,798
Cash payments	(25,609)	(17,118)
Balance at end of period	1,170	1,663
Current restructuring liabilities	1,170	1,663
Cumulative Effect, Period of Adoption, Adjustment
Activity and balance of the restructuring liability accounts
Balance at beginning of period		(11,160)
Workforce reduction
Activity and balance of the restructuring liability accounts
Balance at beginning of period	2,915	3,983
Charges	5,306	5,015
Cash payments	(7,051)	(7,335)
Balance at end of period	1,170	1,663
Current restructuring liabilities	$ 1,170	$ 1,663
Number of employee reduction \| employee	120	79
Workforce reduction \| Cumulative Effect, Period of Adoption, Adjustment
Activity and balance of the restructuring liability accounts
Balance at beginning of period		$ 0
Other restructuring activities
Activity and balance of the restructuring liability accounts
Balance at beginning of period	$ 0	11,160
Charges	18,558	9,783
Cash payments	(18,558)	(9,783)
Balance at end of period	0	0
Current restructuring liabilities	$ 0	0
Other restructuring activities \| Cumulative Effect, Period of Adoption, Adjustment
Activity and balance of the restructuring liability accounts
Balance at beginning of period		$ (11,160)

INTEREST AND OTHER INCOME (LOSS), NET (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Other Income and Expenses [Abstract]
Interest income	$ 465	$ 849	$ 1,553	$ 6,262
Gains (losses) on non-hedge designated foreign currency forward contracts	(4,414)	1,282	5,295	3,005
Foreign currency exchange gains (losses)	4,959	(2,537)	(8,534)	(7,376)
Other	(215)	638	86	(678)
Interest and other income (loss), net	$ 795	$ 232	$ (1,600)	$ 1,213

INCOME TAXES (Details) $ in Millions	3 Months Ended
INCOME TAXES (Details) $ in Millions	Jul. 31, 2021 USD ($)
Income Tax Disclosure [Abstract]
Intra-entity transfer of non-US intellectual property rights, income tax benefit	$ (124.2)

SHORT-TERM AND LONG-TERM INVESTMENTS - Components of Investments (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 242,853
Estimated Fair Value	242,898
U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	242,853	$ 232,811
Gross Unrealized Gains	51	109
Gross Unrealized Losses	(6)	(27)
Estimated Fair Value	242,898	232,893
Included in short-term investments \| U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	181,966	150,559
Gross Unrealized Gains	44	109
Gross Unrealized Losses	0	(1)
Estimated Fair Value	182,010	150,667
Included in long-term investments \| U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	60,887	82,252
Gross Unrealized Gains	7	0
Gross Unrealized Losses	(6)	(26)
Estimated Fair Value	$ 60,888	$ 82,226

SHORT-TERM AND LONG-TERM INVESTMENTS - Legal Maturities of Debt Investments (Details) $ in Thousands	Jul. 31, 2021 USD ($)
Amortized Cost
Less than one year	$ 181,966
Due in 1-2 years	60,887
Amortized Cost	242,853
Estimated Fair Value
Less than one year	182,010
Due in 1-2 years	60,888
Estimated Fair Value	$ 242,898

FAIR VALUE MEASUREMENTS - Fair Value Measurements (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Assets:
Debt securities	$ 242,898
Fair value, Measurements, Recurring
Assets:
Deferred compensation plan assets	12,380	$ 8,213
Total assets measured at fair value	1,279,279	1,180,842
Liabilities:
Total liabilities measured at fair value	24,391	29,194
Fair value, Measurements, Recurring \| Money market funds
Assets:
Cash equivalents	909,976	889,293
Fair value, Measurements, Recurring \| Time deposits
Assets:
Cash equivalents	30,029
Fair value, Measurements, Recurring \| Level 1
Assets:
Deferred compensation plan assets	12,380	8,213
Total assets measured at fair value	1,027,783	947,867
Liabilities:
Total liabilities measured at fair value	0	0
Fair value, Measurements, Recurring \| Level 1 \| Money market funds
Assets:
Cash equivalents	909,976	889,293
Fair value, Measurements, Recurring \| Level 1 \| Time deposits
Assets:
Cash equivalents	30,029
Fair value, Measurements, Recurring \| Level 2
Assets:
Deferred compensation plan assets	0	0
Total assets measured at fair value	251,496	232,975
Liabilities:
Total liabilities measured at fair value	24,391	29,194
Fair value, Measurements, Recurring \| Level 2 \| Money market funds
Assets:
Cash equivalents	0	0
Fair value, Measurements, Recurring \| Level 2 \| Time deposits
Assets:
Cash equivalents	0
Fair value, Measurements, Recurring \| Level 3
Assets:
Deferred compensation plan assets	0	0
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Fair value, Measurements, Recurring \| Level 3 \| Money market funds
Assets:
Cash equivalents	0	0
Fair value, Measurements, Recurring \| Level 3 \| Time deposits
Assets:
Cash equivalents	0
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring
Assets:
Derivative asset	8,598	82
Liabilities:
Derivative liability	3,709	681
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring \| Level 1
Assets:
Derivative asset	0	0
Liabilities:
Derivative liability	0	0
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring \| Level 2
Assets:
Derivative asset	8,598	82
Liabilities:
Derivative liability	3,709	681
Foreign Currency Forward Contracts \| Fair value, Measurements, Recurring \| Level 3
Assets:
Derivative asset	0	0
Liabilities:
Derivative liability	0	0
Forward Starting Interest Rate Swaps
Liabilities:
Derivative liability		28,513
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring
Liabilities:
Derivative liability	20,682
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring \| Level 1
Liabilities:
Derivative liability	0	0
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring \| Level 2
Liabilities:
Derivative liability	20,682	28,513
Forward Starting Interest Rate Swaps \| Fair value, Measurements, Recurring \| Level 3
Liabilities:
Derivative liability	0	0
Bond mutual fund \| Fair value, Measurements, Recurring
Assets:
Debt securities	75,398	50,361
Bond mutual fund \| Fair value, Measurements, Recurring \| Level 1
Assets:
Debt securities	75,398	50,361
Bond mutual fund \| Fair value, Measurements, Recurring \| Level 2
Assets:
Debt securities	0	0
Bond mutual fund \| Fair value, Measurements, Recurring \| Level 3
Assets:
Debt securities	0	0
U.S. government obligations \| Fair value, Measurements, Recurring
Assets:
Debt securities	242,898	232,893
U.S. government obligations \| Fair value, Measurements, Recurring \| Level 1
Assets:
Debt securities	0	0
U.S. government obligations \| Fair value, Measurements, Recurring \| Level 2
Assets:
Debt securities	242,898	232,893
U.S. government obligations \| Fair value, Measurements, Recurring \| Level 3
Assets:
Debt securities	$ 0	$ 0

FAIR VALUE MEASUREMENTS - Condensed Consolidated Balance Sheet (Details) - Fair value, Measurements, Recurring - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Assets:
Total assets measured at fair value	$ 1,279,279	$ 1,180,842
Liabilities:
Total liabilities measured at fair value	24,391	29,194
Cash equivalents
Assets:
Cash equivalents	1,015,403	939,654
Short-term investments
Assets:
Short-term investments	182,010	150,667
Prepaid expenses and other
Assets:
Other assets	8,598	82
Long-term investments
Assets:
Long-term investments	60,888
Other long-term assets
Assets:
Other assets	12,380	90,439
Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	3,709	681
Other long-term obligations
Liabilities:
Other long-term obligations	20,682	28,513
Level 1
Assets:
Total assets measured at fair value	1,027,783	947,867
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 \| Cash equivalents
Assets:
Cash equivalents	1,015,403	939,654
Level 1 \| Short-term investments
Assets:
Short-term investments	0	0
Level 1 \| Prepaid expenses and other
Assets:
Other assets	0	0
Level 1 \| Long-term investments
Assets:
Long-term investments	0
Level 1 \| Other long-term assets
Assets:
Other assets	12,380	8,213
Level 1 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Level 1 \| Other long-term obligations
Liabilities:
Other long-term obligations	0	0
Level 2
Assets:
Total assets measured at fair value	251,496	232,975
Liabilities:
Total liabilities measured at fair value	24,391	29,194
Level 2 \| Cash equivalents
Assets:
Cash equivalents	0	0
Level 2 \| Short-term investments
Assets:
Short-term investments	182,010	150,667
Level 2 \| Prepaid expenses and other
Assets:
Other assets	8,598	82
Level 2 \| Long-term investments
Assets:
Long-term investments	60,888
Level 2 \| Other long-term assets
Assets:
Other assets	0	82,226
Level 2 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	3,709	681
Level 2 \| Other long-term obligations
Liabilities:
Other long-term obligations	20,682	28,513
Level 3
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Level 3 \| Cash equivalents
Assets:
Cash equivalents	0	0
Level 3 \| Short-term investments
Assets:
Short-term investments	0	0
Level 3 \| Prepaid expenses and other
Assets:
Other assets	0	0
Level 3 \| Long-term investments
Assets:
Long-term investments	0
Level 3 \| Other long-term assets
Assets:
Other assets	0	0
Level 3 \| Accrued liabilities and other short-term obligations
Liabilities:
Accrued liabilities and other short-term obligations	0	0
Level 3 \| Other long-term obligations
Liabilities:
Other long-term obligations	$ 0	$ 0

INVENTORIES (Details) - USD ($) $ in Thousands	9 Months Ended
INVENTORIES (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Aug. 01, 2020	Oct. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 139,338		$ 119,481
Work-in-process	10,556		13,738
Finished goods	204,580		210,050
Deferred cost of goods sold	53,826		40,747
Gross inventories	408,300		384,016
Provision for excess and obsolescence	(38,130)		(39,637)
Inventories, net	370,170		$ 344,379
Provisions	$ 13,460	$ 20,176

PREPAID EXPENSES AND OTHER (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Oct. 31, 2020
Capitalized Contract Cost [Line Items]
Prepaid expenses	$ 75,287		$ 70,647
Prepaid VAT and other taxes	70,735		72,838
Product demonstration equipment, net	35,411		44,793
Other non-trade receivables	17,808		21,981
Derivative assets	8,598		82
Deferred deployment expense	336		604
Prepaid expenses and other	323,283		308,084
Depreciation of product demonstration equipment	7,600	$ 6,500
CEWS receivable
Capitalized Contract Cost [Line Items]
CEWS receivable	1,229		0
Contract assets for unbilled accounts receivable, net
Capitalized Contract Cost [Line Items]
Contract assets	98,812		85,843
Capitalized contract acquisition costs
Capitalized Contract Cost [Line Items]
Contract assets	$ 15,067		$ 11,296

OTHER BALANCE SHEET DETAILS - Accrued Liabilities and Other Short-term Obligations (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020	Aug. 01, 2020	Nov. 02, 2019
Balance Sheet Related Disclosures [Abstract]
Compensation, payroll related tax and benefits	$ 142,713	$ 135,462
Warranty	48,139	49,868	$ 52,166	$ 48,498
Income taxes payable	36,526	6,348
Vacation	30,986	26,945
Finance lease obligations	3,395	2,836
Other	111,532	112,673
Total accrued liabilities and other short-term obligations	$ 373,291	$ 334,132

OTHER BALANCE SHEET DETAILS - Accrued Warranty (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning Balance	$ 49,868	$ 48,498
Current Period Provisions	12,726	19,172
Settlements	(14,455)	(15,504)
Ending Balance	$ 48,139	$ 52,166

OTHER BALANCE SHEET DETAILS - Deferred Revenue (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 183,899	$ 158,363
Less current portion	(126,179)	(108,700)
Long-term deferred revenue	57,720	49,663
Products
Disaggregation of Revenue [Line Items]
Deferred revenue	13,380	17,534
Services
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 170,519	$ 140,829

DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions	9 Months Ended
DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions	Jul. 31, 2021	Oct. 31, 2020
Foreign Currency Forward Contracts \| Designated as Hedging Instrument \| Cash Flow Hedging
Derivative [Line Items]
Derivative asset, notional amount	$ 219.1	$ 254.9
Derivative maturity (in months)	24 months
Foreign Currency Forward Contracts \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative asset, notional amount	$ 241.8	212.0
Derivative maturity (in months)	12 months
Forward Starting Interest Rate Swaps \| Designated as Hedging Instrument \| Cash Flow Hedging \| Secured Debt \| 2025 Term Loan
Derivative [Line Items]
Derivative asset, notional amount	$ 350.0	$ 350.0
Derivative, fixed interest rate	2.957%

ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	$ 2,509,597	$ 2,172,761
Other comprehensive gain (loss) before reclassifications	31,586	(23,274)
Amounts reclassified from AOCI	(858)	5,169
Equity- ending balance	2,924,236	2,428,867
Accumulated Other Comprehensive Gain (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(35,358)	(22,084)
Equity- ending balance	(4,630)	(40,189)
Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	45	152
Other comprehensive gain (loss) before reclassifications	(28)	69
Amounts reclassified from AOCI	0	0
Equity- ending balance	17	221
Unrealized Gain (Loss) Derivatives \| Foreign Currency Forward Contracts
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(219)	925
Other comprehensive gain (loss) before reclassifications	13,574	(4,515)
Amounts reclassified from AOCI	(7,907)	2,742
Equity- ending balance	5,448	(848)
Unrealized Gain (Loss) Derivatives \| Forward Starting Interest Rate Swaps
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(21,535)	(13,686)
Other comprehensive gain (loss) before reclassifications	(1,399)	(12,507)
Amounts reclassified from AOCI	7,049	2,427
Equity- ending balance	(15,885)	(23,766)
Cumulative Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Equity - beginning balance	(13,649)	(9,475)
Other comprehensive gain (loss) before reclassifications	19,439	(6,321)
Amounts reclassified from AOCI	0	0
Equity- ending balance	$ 5,790	$ (15,796)

LEASES - Narrative (Details) ft² in Millions, $ in Millions	9 Months Ended
LEASES - Narrative (Details) ft² in Millions, $ in Millions	Jul. 31, 2021 USD ($) ft²
Leases [Abstract]
Area leased (in sq ft) \| ft²	1.3
Remaining lease term (up to)	11 years
Extension term (up to)	10 years
Termination period (up to)	5 years
ROU assets that involve subleased or vacant space \| $	$ 4.3

LEASES - Leases Included in the Balance Sheet (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Operating leases:
Operating ROU assets	$ 48,937	$ 57,026
Operating lease liabilities	70,320	80,450
Finance leases:
Buildings, gross	75,616	70,791
Less: accumulated depreciation	(22,664)	(17,837)
Buildings, net	52,952	$ 52,954
Finance lease liabilities	$ 66,530
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Equipment, building, furniture and fixtures, net	Equipment, building, furniture and fixtures, net
Accrued liabilities and other short-term obligations
Finance leases:
Finance lease liabilities	$ 66,530	$ 64,401
Other long-term obligations
Finance leases:
Finance lease liabilities	$ 66,530	$ 64,401

LEASES - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
LEASES - Lease Cost (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Leases [Abstract]
Operating lease costs	$ 4,085	$ 4,234	$ 12,516	$ 13,435
Finance lease cost:
Amortization of finance ROU asset	1,224	1,097	3,580	3,330
Interest on finance lease liabilities	1,243	1,162	3,671	3,574
Total finance lease cost	2,467	2,259	7,251	6,904
Non-capitalized lease cost	216	883	842	2,211
Variable lease cost	1,393	1,265	4,444	3,900
Net lease cost	8,161	8,641	25,053	26,450
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Amortization	$ 2,300	$ 2,200	$ 7,200	$ 8,700

LEASES - Leases Maturity (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Operating Leases
Remaining fiscal 2021	$ 5,472
2022	19,862
2023	16,087
2024	13,768
2025	9,437
Thereafter	10,272
Total lease payments	74,898
Less: Imputed interest	(4,578)
Present value of lease liabilities	70,320	$ 80,450
Less: Current portion of present value of minimum lease payments	(19,085)	(19,035)
Long-term portion of present value of minimum lease payments	51,235	61,415
Finance Leases
Remaining fiscal 2021	8,146
2022	8,500
2023	8,500
2024	8,620
2025	8,706
Thereafter	55,532
Total lease payments	98,004
Less: Imputed interest	(31,474)
Present value of lease liabilities	66,530
Less: Current portion of present value of minimum lease payments	(3,395)	$ (2,836)
Long-term portion of present value of minimum lease payments	63,135
Lease, Liability, Payment, Due [Abstract]
Remaining fiscal 2021	13,618
2022	28,362
2023	24,587
2024	22,388
2025	18,143
Thereafter	65,804
Total lease payments	172,902
Less: Imputed interest	(36,052)
Present value of lease liabilities	136,850
Less: Current portion of present value of minimum lease payments	(22,480)
Long-term portion of present value of minimum lease payments	$ 114,370

LEASES - Weighted Average Remaining Lease Terms and Discount Rates (Details)	Jul. 31, 2021	Oct. 31, 2020
Weighted-average remaining lease term in years:
Operating leases	4 years 4 months 6 days	4 years 10 months 13 days
Finance leases	10 years 11 months 19 days	11 years 8 months 15 days
Weighted-average discount rates:
Operating leases	2.75%	2.82%
Finance leases	7.56%	7.56%

SHORT-TERM AND LONG-TERM DEBT - Narrative (Details) - Secured Debt - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Oct. 31, 2020	Jan. 23, 2020
Debt Instrument [Line Items]
Debt issuance costs, net	$ 2,500		$ 2,900
Amortization of debt issuance costs	500	$ 500
2025 Term Loan
Debt Instrument [Line Items]
Aggregate principal amount	682,605			$ 693,000
Debt issuance costs, net	2,488
Fair value of debt	$ 680,900

SHORT-TERM AND LONG-TERM DEBT - Debt Components (Details) - Secured Debt - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020	Jan. 23, 2020
Debt Instrument [Line Items]
Deferred Debt Issuance Costs	$ (2,500)	$ (2,900)
2025 Term Loan
Debt Instrument [Line Items]
Principal Balance	682,605		$ 693,000
Unamortized Discount	(1,332)
Deferred Debt Issuance Costs	(2,488)
Net Carrying Value	$ 678,785	$ 683,286

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

EARNINGS PER SHARE CALCULATION - Earnings Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Earnings Per Share [Abstract]
Net income	$ 238,232	$ 142,267	$ 396,697	$ 296,250
Basic weighted average shares outstanding (in shares)	155,271	154,184	155,277	154,136
Effect of dilutive potential common shares (in shares)	1,473	2,134	1,465	1,605
Dilutive weighted average shares (in shares)	156,744	156,318	156,742	155,741
Basic EPS (in dollars per share)	$ 1.53	$ 0.92	$ 2.55	$ 1.92
Diluted EPS (in dollars per share)	$ 1.52	$ 0.91	$ 2.53	$ 1.90
Antidilutive employee share-based awards, excluded (in shares)	131	13	99	316

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-URI http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1337-109256

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 65
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=125512782&loc=d3e4984-109258

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(23))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=125512782&loc=d3e3842-109258

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(25))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1252-109256

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(27))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=125512782&loc=d3e4984-109258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=125512782&loc=d3e3842-109258

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1252-109256

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 65
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(27))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(23))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1337-109256

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 65
-Paragraph 1
-Subparagraph (e)(4)
-URI http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(25))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

STOCKHOLDERS’ EQUITY - Narrative (Details) - USD ($)	9 Months Ended
STOCKHOLDERS’ EQUITY - Narrative (Details) - USD ($)	Jul. 31, 2021	Aug. 01, 2020	Dec. 13, 2018
Equity [Abstract]
Stock repurchase program authorized amount			$ 500,000,000
Payments for repurchase of common stock	$ 36,484,000	$ 26,328,000

STOCKHOLDERS’ EQUITY - Summary of the Stock Repurchase Program (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Jul. 31, 2021 USD ($) $ / shares shares
Shares Repurchased
Cumulative beginning balance (in shares) \| shares	5,710,912
Repurchase of common stock under the stock repurchase program (in shares) \| shares	1,203,439
Cumulative ending balance (in shares) \| shares	6,914,351
Weighted-Average Price per Share
Cumulative beginning balance (in dollars per share) \| $ / shares	$ 39.33
Repurchase of common stock under the stock repurchase program (in dollars per share) \| $ / shares	54.31
Cumulative ending balance (in dollars per share) \| $ / shares	$ 41.94
Amount Repurchased (in thousands)
Cumulative beginning balance \| $	$ 224,611
Repurchase of common stock under the stock repurchase program \| $	65,356
Cumulative ending balance \| $	$ 289,967

SHARE-BASED COMPENSATION EXPENSE - Narrative (Details) shares in Millions, $ in Millions		9 Months Ended
	Jan. 29, 2021 shares	Jul. 31, 2021 USD ($) purchase_period
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Offer period		12 months
Number of purchase periods \| purchase_period		2
Purchase period		6 months
Purchase price of common stock		85.00%
Increase in number of shares authorized (in shares) \| shares	8.7
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation \| $		$ 160.6
Weighted-average period for recognition of share-based compensation (in years)		1 year 6 months 29 days

SHARE-BASED COMPENSATION EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense capitalized in inventory, net	$ (193)	$ (114)	$ 64	$ 39
Total share-based compensation	22,471	17,259	62,970	50,838
CEWS benefit in cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,352	1,967	6,429	5,343
Product
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,037	960	2,488	2,458
Service
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	1,315	1,007	3,941	2,885
CEWS benefit in operating expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	20,312	15,406	56,477	45,456
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	5,541	4,286	16,179	12,957
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	6,534	5,180	18,960	15,057
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 8,237	$ 5,940	$ 21,338	$ 17,442

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Narrative (Details) $ in Thousands	9 Months Ended
	Jul. 31, 2021 USD ($) segment	Oct. 31, 2020 USD ($)
Segment Reporting [Abstract]
Equipment, building, furniture and fixtures, net	$ 288,937	$ 272,377
Operating right-of-use assets	$ 48,937	$ 57,026
Number of operating segments \| segment	4

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Other Intangibles Assets, Goodwill and Maintenance Spares (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Segment Reporting Information [Line Items]
Other intangible assets, net	$ 73,974
Goodwill	311,569	$ 310,847
Maintenance spares, net	61,048
Networking Platforms
Segment Reporting Information [Line Items]
Other intangible assets, net	9,865
Goodwill	66,329
Maintenance spares, net	0
Platform Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	156,191
Maintenance spares, net	0
Blue Planet Automation Software and Services
Segment Reporting Information [Line Items]
Other intangible assets, net	64,109
Goodwill	89,049
Maintenance spares, net	0
Global Services
Segment Reporting Information [Line Items]
Other intangible assets, net	0
Goodwill	0
Maintenance spares, net	$ 61,048

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Revenue, Profit (Loss) and Net Income (Loss) Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Less: Non-performance operating expenses
Selling and marketing	$ 114,924	$ 94,763	$ 322,589	$ 303,043
General and administrative	48,863	41,635	132,491	126,133
Significant asset impairments and restructuring costs	9,789	6,515	23,865	14,798
Amortization of intangible assets	5,967	5,840	17,896	17,532
Acquisition and integration costs (recoveries)	259	(2,329)	860	904
Add: Other non-performance financial items
Interest expense and other income (loss), net	(6,981)	(7,019)	(24,521)	(22,713)
Loss on extinguishment and modification of debt	0	0	0	(646)
Less: Provision (benefit) for income taxes	(96,690)	38,750	(63,271)	73,872
Net income	238,232	142,267	396,697	296,250
Operating Segments
Add: Other non-performance financial items
Net income	328,325	334,460	855,648	855,891
Networking Platforms \| Operating Segments
Add: Other non-performance financial items
Net income	244,535	262,801	612,378	642,057
Platform Software and Services \| Operating Segments
Add: Other non-performance financial items
Net income	31,526	24,299	95,692	74,918
Blue Planet Automation Software and Services \| Operating Segments
Add: Other non-performance financial items
Net income	(3,243)	(5,316)	11	(12,828)
Global Services \| Operating Segments
Add: Other non-performance financial items
Net income	$ 55,507	$ 52,676	$ 147,567	$ 151,744

SEGMENTS AND ENTITY-WIDE DISCLOSURES - Geographic Distribution of Equipment, Building, Furniture and Fixtures (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	$ 337,874	$ 329,403
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	242,495	214,188
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	54,050	65,321
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Equipment, building, furniture and fixtures, net	$ 41,329	$ 49,894

COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands, $ in Millions	3 Months Ended		9 Months Ended			53 Months Ended
	Jul. 31, 2021 USD ($)	Aug. 01, 2020 USD ($)	Jul. 31, 2021 USD ($) government_entity	Jul. 31, 2021 CAD ($) government_entity	Aug. 01, 2020 USD ($)	Jul. 31, 2021 USD ($)	Jul. 31, 2021 CAD ($)	Jul. 31, 2021 CAD ($)
Loss Contingencies [Line Items]
Total revenue \| $	$ 988,141	$ 976,712	$ 2,579,198		$ 2,703,677
Canadian Grant
Loss Contingencies [Line Items]
Maximum amount of Canadian grant	46,200		$ 46,200			$ 46,200		$ 57.6
Number of Canadian government entities \| government_entity			3	3
Total revenue			$ 6,300	$ 8.0		39,000	$ 48.6
Amounts receivable from grant	$ 4,700		$ 4,700			$ 4,700		$ 5.8

- Definition

+ References

+ Details

SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands	4 Months Ended	9 Months Ended
	Sep. 03, 2021	Jul. 31, 2021	Oct. 31, 2020
Subsequent Event [Line Items]
Stock repurchases (in shares)		1,203,439
Stock repurchases		$ 65,356
Average price of shares repurchased (in dollars per share)		$ 54.31
Aggregate shares repurchased (in shares)		6,914,351	5,710,912
Subsequent event
Subsequent Event [Line Items]
Stock repurchases (in shares)	176,815
Stock repurchases	$ 10,000
Average price of shares repurchased (in dollars per share)	$ 56.57
Aggregate shares repurchased (in shares)	7,091,166
Authorized funds remaining under stock repurchase program	$ 200,000