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SUBSEQUENT EVENTS	12 Months Ended
	Nov. 01, 2025
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Stock Repurchase Program From the end of the fourth quarter of fiscal 2025 through December 5, 2025, Ciena repurchased 162,347 shares of its common stock for an aggregate purchase price of $31.7 million at an average price of $195.12 per share, inclusive of repurchases pending settlement under its current stock repurchase program. As of December 5, 2025, Ciena has an aggregate of $638.6 million of authorized funds remaining under this repurchase program.

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- Definition

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.

+ References

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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