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Other Employee Benefit Plans	12 Months Ended
Other Employee Benefit Plans	Oct. 31, 2011
Compensation and Retirement Disclosure [Abstract]
OTHER EMPLOYEE BENEFIT PLANS	OTHER EMPLOYEE BENEFIT PLANS Effective March 1, 2010, Ciena has a Defined Contribution Pension Plan that covers all of its Canada-based employees who are not part of an excluded group. Total contributions (employee and employer) cannot exceed the lesser of 18% of participant earnings and an annual dollar limit ($22,970 CAD for 2011). This plan includes a required employer contribution of 1% for all participants and a 50% matching of participant contributions up to a total annual maximum of $3,000 CAD per employee. During fiscal 2010 and 2011, Ciena made matching contributions of approximately $2.5 million CAD and $4.3 million CAD, respectively. Ciena has a 401(k) defined contribution profit sharing plan. The plan covers all U.S. based employees who are not part of an excluded group. Participants may contribute up to 60% of pre-tax compensation, subject to certain limitations. The plan includes an employer matching contribution equal to 50% of the first 6% 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 2009, 2010 and 2011, Ciena made matching contributions of approximately $3.2 million, $3.4 million and $3.9 million, respectively.