Segment and Entity Wide Disclosures (Details Textual)	9 Months Ended
Jul. 31, 2011
Segment and Entity Wide Disclosures (Textuals) [Abstract]
Percentage of total revenue for the period specifically identified	10.00%
Percentage of total equipment, furniture and fixtures for the period specifically identified	10.00%

Name:

cien_PercentageOfEquipmentFurnitureAndFixturesSpecificallyIdentifiedGeographicDistribution

Namespace Prefix:

cien

Data Type:

num:percentItemType

Balance Type:

na

Period Type:

duration