SUBSEQUENT EVENTS	6 Months Ended
Apr. 27, 2024
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Stock Repurchase Program From the end of the second quarter of fiscal 2024 through May 31, 2024, Ciena repurchased an additional 0.5 million shares of its common stock for an aggregate purchase price of $24.0 million at an average price of $48.54 per share, inclusive of repurchases pending settlement. As of May 31, 2024, Ciena has repurchased an aggregate of 16.4 million shares and has an aggregate of $137.0 million of authorized funds remaining under its stock repurchase program.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

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