INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
Jul. 29, 2023	Jul. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 36,274	$ 36,521

Amortization of Intangible Assets Excluding Amortization Included in Property, Plant and Equipment

No definition available.

Name:	cien_AmortizationOfIntangibleAssetsExcludingAmortizationIncludedInPropertyPlantAndEquipment
Namespace Prefix:	cien_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration