Restructuring and Other Termination Benefits Table (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Restructuring Charges	$ 63	$ 3	$ 203	$ 4
Other Benefit Total [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	28	3	42	4
Workforce Reduction Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Restructuring and Related Cost, Incurred Cost	31	0	31	0
Workforce Reduction Plan [Member] | Salary Expense [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Restructuring and Related Cost, Incurred Cost	5	0	5	0
Workforce Reduction Plan [Member] | Acceleration of Stock-Based Compensation Awards [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Restructuring and Related Cost, Incurred Cost	25	0	25	0
Workforce Reduction Plan [Member] | Other Costs Associated with Retirement [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Restructuring and Related Cost, Incurred Cost	1	0	1
Ceo Aubrey K Mcclendon [Member] | McClendon Benefit Total [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	3	0	67	0
Ceo Aubrey K Mcclendon [Member] | Cash Salary and Bonus Costs [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	0	0	11	0
Ceo Aubrey K Mcclendon [Member] | Claw-Back Bonus [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	0	0	11	0
Ceo Aubrey K Mcclendon [Member] | Acceleration of Restricted Stock Awards [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	0	0	22	0
Ceo Aubrey K Mcclendon [Member] | Acceleration of Performance Shares [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	3	0	16	0
Ceo Aubrey K Mcclendon [Member] | Other Costs Associated with Retirement [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	0	0	7	0
VSP Program | VSP Benefit Total [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	1	0	63	0
VSP Program | Cash Salary and Bonus Costs [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	0	0	33	0
VSP Program | Acceleration of Restricted Stock Awards [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	1	0	28	0
VSP Program | Other Costs Associated with Retirement [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Severance Costs	$ 0	$ 0	$ 2	$ 0