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OTHER EMPLOYEE BENEFIT PLANS	12 Months Ended
	Nov. 01, 2025
Retirement Benefits [Abstract]
OTHER EMPLOYEE BENEFIT PLANS	OTHER EMPLOYEE BENEFIT PLANS Ciena has a Defined Contribution Pension Plan that covers a majority of its Canada-based employees. Total contributions (employee and employer) cannot exceed the lesser of 18% of participant earnings and an annual limit of CAD$35,390 (approximately $25,260 for 2025). This plan includes a required employer contribution of 1% for all participants and an employer matching contribution equal to 50% of the first 6% an employee contributes. During fiscal 2025, 2024 and 2023, Ciena made matching contributions of approximately CAD$11.9 million (approximately $8.5 million), CAD$11.6 million (approximately $8.3 million) and CAD$10.6 million (approximately $7.6 million), respectively. Ciena has a 401(k) defined contribution profit sharing plan that covers a majority of its United States-based employees. Participants may contribute up to 60% of base pay through pre-tax or Roth contributions, subject to certain limitations. The plan includes an employer matching contribution equal to 50% of the first 8% an employee contributes each pay period. Ciena may also make discretionary annual profit contributions up to the IRS regulated limit. Ciena has made no profit sharing contributions to date. During fiscal 2025, 2024 and 2023, Ciena made matching contributions of approximately $14.0 million, $11.0 million and $10.4 million, respectively.

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- Definition

The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/715/tableOfContent

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 712
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/712/tableOfContent

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 710
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/710/tableOfContent

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/718/tableOfContent

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- References

No definition available.

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