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ACCOUNTS RECEIVABLE (Tables) | 12 Months Ended
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Oct. 28, 2023
Receivables [Abstract] |
Schedule of Activity in Allowance for Doubtful Accounts | The following table summarizes the activity in Ciena’s allowance for credit losses for the fiscal years indicated (in thousands):
Year Ended |  | Beginning Balance |  | Effect of adoption of new accounting standard |  | Provisions |  | Net Deductions |  | Ending Balance
October 30, 2021 |  | $ | 10,598 |  |  | $ | 2,206 |  |  | $ | 2,346 |  |  | $ | 4,238 |  |  | $ | 10,912 |
October 29, 2022(1) |  | $ | 10,912 |  |  | $ | — |  |  | $ | 4,199 |  |  | $ | 4,153 |  |  | $ | 10,958 |
October 28, 2023 |  | $ | 10,958 |  |  | $ | — |  |  | $ | 5,718 |  |  | $ | 5,022 |  |  | $ | 11,654 |
(1) On March 7, 2022, Ciena announced its decision to suspend its business operations in Russia immediately. As a result, Ciena’s allowance for doubtful accounts includes a provision for a significant asset impairment of $1.8 million for a trade receivable related to this decision.

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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