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Segment and Entity Wide Disclosures (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012	Oct. 31, 2012
Ciena's geographic distribution of revenue
Revenue	$ 507,712	$ 477,617	$ 960,805	$ 894,302
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	117,553		117,553		123,580
United States [Member]
Ciena's geographic distribution of revenue
Revenue	287,572	252,668	551,807	485,746
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	62,720		62,720		64,653
Canada[Member]
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	43,964		43,964		48,376
Other International [Member]
Ciena's geographic distribution of revenue
Revenue	220,140	224,949	408,998	408,556
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	$ 10,869		$ 10,869		$ 10,551

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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