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SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS | 6 Months Ended
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Apr. 30, 2022
Restructuring and Related Activities [Abstract] |
SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS | SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS Restructuring Costs Ciena has undertaken a number of restructuring activities intended to reduce expense and to 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 the Condensed Consolidated Balance Sheets, for the six months ended April 30, 2022 (in thousands):
| Workforce reduction |  | Other restructuring activities |  | Total
Balance at October 30, 2021 | $ | 781 |  |  | $ | — |  |  | $ | 781 |
Charges | 1,413 |  | (1) | 7,018 |  | (2) | 8,431 |
Cash payments | (1,388) |  |  | (7,018) |  |  | (8,406) |
Balance at April 30, 2022 | $ | 806 |  |  | $ | — |  |  | $ | 806 |
Current restructuring liabilities | $ | 806 |  |  | $ | — |  |  | $ | 806 |
(1) Reflects employee costs associated with workforce reductions during the six months ended April 30, 2022 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. 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 the Condensed Consolidated Balance Sheets for the six months ended May 1, 2021 (in thousands):
| Workforce reduction |  | Other restructuring activities |  | Total
Balance at October 30, 2020 | 2,915 |  |  | $ | — |  |  | $ | 2,915 |
Charges | 2,617 |  | (1) | 11,459 |  | (2) | 14,076 |
Cash payments | (4,696) |  |  | (11,459) |  |  | (16,155) |
Balance at May 1, 2021 | $ | 836 |  |  | $ | — |  |  | $ | 836 |
Current restructuring liabilities | $ | 836 |  |  | $ | — |  |  | $ | 836 |
(1) Reflects employee costs associated with workforce reductions during the six months ended May 1, 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 real estate facilities. 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 immediately suspend its business operations in Russia. As a result, Ciena recorded impairment charges of $4.1 million of which $2.0 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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