Subsequent Events (Details) (Lab 10 Building Ottawa Canada [Member], Subsequent Event [Member], CAD) In Millions, unless otherwise specified	Aug. 29, 2013
Lab 10 Building Ottawa Canada [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate annual payment for additional lease period	10.9

Operating Leases, Estimated Future Aggregate Annual Payment Due

No definition available.

Name:	cien_OperatingLeasesEstimatedFutureAggregateAnnualPaymentDue
Namespace Prefix:	cien_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant