Consolidating Guarantor Financial Information (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2015 USD ($)
Consolidating Guarantor Financial Information [Abstract]
Issuer and subsidiary guarantors, ownership percentage	100.00%
Interest Allocated To Subsidiary Guarantor	$ 54

Equity Method Investments Ownership Percentage of Subsidiary.

No definition available.

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Namespace Prefix:	ce_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration