Credit Facility	6 Months Ended
Apr. 30, 2013
Debt Disclosure [Abstract]
CREDIT FACILITY	CREDIT FACILITY During fiscal 2012, Ciena entered into a $150.0 million senior secured asset-based revolving credit facility (the “Credit Facility”). The Credit Facility matures on August 13, 2015, provided that it will mature early on December 15, 2014, if any of Ciena's 4.0% senior convertible notes due March 15, 2015 are then outstanding. Ciena principally expects to use the Credit Facility to support the issuance of letters of credit that arise in the ordinary course of its business and thereby to reduce its use of cash required to collateralize these instruments. As of April 30, 2013, letters of credit totaling $48.1 million were collateralized by the Credit Facility. There were no borrowings outstanding under the Credit Facility as of April 30, 2013.

CREDIT FACILITY

During fiscal 2012, Ciena entered into a $150.0 million senior secured asset-based revolving credit facility (the “Credit Facility”). The Credit Facility matures on August 13, 2015, provided that it will mature early on December 15, 2014, if any of Ciena's 4.0% senior convertible notes due March 15, 2015 are then outstanding. Ciena principally expects to use the Credit Facility to support the issuance of letters of credit that arise in the ordinary course of its business and thereby to reduce its use of cash required to collateralize these instruments. As of April 30, 2013, letters of credit totaling $48.1 million were collateralized by the Credit Facility. There were no borrowings outstanding under the Credit Facility as of April 30, 2013.