Other (Charges) Gains, Net (Schedule of Other (Charges) Gains, Net) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring and Related Activities [Abstract]
Employee termination benefits	$ (10)	$ (1)	$ (14)	$ (3)
Plant/office closures	0	0	0	1
Commercial disputes	0	0	(1)	0
Other	0	3	0	3
Total	$ (10)	$ 2	$ (15)	$ 1

The charge against earnings in the period for known and estimated costs of one time termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan.

No definition available.

Name:	ce_OneTimeTerminationBenefits
Namespace Prefix:	ce_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration