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INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	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

X

- References

No definition available.

+ Details

Name:	us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration