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SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS | 12 Months Ended
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Oct. 29, 2022
Restructuring and Related Activities [Abstract] |
SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS | SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTSCiena has undertaken a number of restructuring activities intended to reduce expense and align 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 Consolidated Balance Sheets, for the fiscal years indicated (in thousands):
| Workforce reduction |  | Other restructuring activities |  | Total
Balance at November 2, 2019 | $ | 3,983 |  |  | $ | 11,160 |  |  | $ | 15,143 |
Charges | 7,282 |  | (1) | 15,370 |  | (2) | 22,652 |
Adjustments related to ASC 842 | — |  |  | (11,160) |  | (3) | (11,160) |
Cash payments | (8,350) |  |  | (15,370) |  |  | (23,720) |
Balance at October 31, 2020 | 2,915 |  |  | — |  |  | 2,915 |
Charges | 5,938 |  | (1) | 23,627 |  | (2) | 29,565 |
Cash payments | (8,072) |  |  | (23,627) |  |  | (31,699) |
Balance at October 30, 2021 | 781 |  |  | — |  |  | 781 |
Charges | 3,156 |  | (1) | 26,814 |  | (2) | 29,970 |
Cash payments | (2,722) |  |  | (22,194) |  |  | (24,916) |
Balance at October 29, 2022 | $ | 1,215 |  |  | $ | 4,620 |  |  | $ | 5,835 |
Current restructuring liabilities | $ | 1,215 |  |  | $ | 4,620 |  |  | $ | 5,835 |
_________________________________ (1) Reflects employee costs associated with workforce reductions 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 real estate facilities. (3) Represents restructuring reserve liability recognized as a reduction to Operating ROU assets, net in relation to adoption of ASC 842. Significant Asset Impairments In February 2022, armed conflict escalated between Russia and Ukraine. The United States and certain other countries have imposed sanctions on Russia and could impose further sanctions. On March 7, 2022, Ciena announced its decision to suspend its business operations in Russia immediately. As a result, Ciena recorded impairment charges of approximately $3.8 million of which $1.8 million was a provision for credit losses.

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- Definition The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(e)) -URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -URI https://asc.fasb.org/topic&trid=2175745 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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