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Segment and Entity Wide Disclosures (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Ciena's geographic distribution of revenue
Revenue	$ 1,833,923	$ 1,741,970	$ 1,236,636
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	123,580	122,558	120,294
United States [Member]
Ciena's geographic distribution of revenue
Revenue	972,576	930,880	744,232
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	64,653	60,848	63,675
Canada [Member]
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	48,376	47,424	45,103
International [Member]
Ciena's geographic distribution of revenue
Revenue	861,347	811,090	492,404
Ciena's geographic distribution of equipment, furniture and fixtures
Equipment, furniture and fixtures, net	$ 10,551	$ 14,286	$ 11,516

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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