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Restructuring and Other Termination Benefits - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Feb. 07, 2013 Employee	Dec. 31, 2012 Employee
Defined Benefit Plan Disclosure [Line Items]
Severance Costs	$ (3)	$ 13
Ceo Aubrey K Mcclendon [Member]
Defined Benefit Plan Disclosure [Line Items]
Severance Costs	(4)	64
VSP Program
Defined Benefit Plan Disclosure [Line Items]
Severance Costs	$ 0	$ 56	$ 56
Number of Employees Selected for Voluntary Program					275
Number of Employees That Accepted Voluntary Program				211

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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