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CIENA CORPORATION AND SIGNIFICANT ACCOUNTING POLICIES AND ESTIMATES - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Oct. 29, 2022 | Oct. 30, 2021
Significant Accounting Policies [Line Items] |  |
Cost method equity investments | $ 20,698 | $ 8,578
Expected economic lives of finite-lived intangible assets (in years) | 7 years |
Expected number of years Spares usage cost is expensed | 4 years |
Cumulative amount of temporary differences for unremitted foreign earnings for which a deferred tax liability has not been recognized | $ 477,000 |
Cumulative amount of temporary differences for unremitted foreign earnings for which a deferred tax liability has not been recognized | $ 33,000 |
One-time employee termination benefits related to service period (in days) | 60 days |
Accumulated deficit | $ (3,632,230) | $ (3,785,132)
Minimum |  |
Significant Accounting Policies [Line Items] |  |
Payment terms and cash received | 30 days |
Maximum |  |
Significant Accounting Policies [Line Items] |  |
Payment terms and cash received | 90 days |
Foreign exchange contract maturities | 24 months |
Equipment, furniture and fixtures | Minimum |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful lives capitalized and amortized straight-line (in years) | 3 years |
Equipment, furniture and fixtures | Maximum |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful lives capitalized and amortized straight-line (in years) | 5 years |
Software and website development | Minimum |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful lives capitalized and amortized straight-line (in years) | 2 years |
Software and website development | Maximum |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful lives capitalized and amortized straight-line (in years) | 5 years |

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