INCOME TAXES (Details) $ in Millions	9 Months Ended
Jul. 30, 2022 USD ($)
Income Tax Disclosure [Abstract]
Intra-entity transfer of non-US intellectual property rights, income tax benefit	$ 124.2

Effective Income Tax Rate Reconciliation, Intra-Entity Transfer Of Foreign Intellectual Property Rights, Amount

No definition available.

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