SHARE-BASED COMPENSATION EXPENSE - Narrative (Details) - Restricted Stock Units (RSUs) $ in Millions	9 Months Ended
	Aug. 02, 2025 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation	$ 284.0
Weighted-average period for recognition of share-based compensation (in years)	1 year 4 months 24 days

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

CIENA CORP 10-Q