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INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended
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Apr. 29, 2023 | Apr. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |  |
Amortization of intangible assets | $ 23,600 | $ 24,463

X
- Definition Amortization of Intangible Assets Excluding Amortization Included in Property, Plant and Equipment + References No definition available. + Details
Name: | cien_AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment
Namespace Prefix: | cien_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration