Restructuring and Other Termination Benefits Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended		3 Months Ended					3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Other Benefit Total [Member]	Sep. 30, 2012 Other Benefit Total [Member]	Sep. 30, 2013 Other Benefit Total [Member]	Sep. 30, 2012 Other Benefit Total [Member]	Sep. 30, 2013 One-time Termination Benefits [Member] Expected Total [Member]	Sep. 30, 2013 One-time Termination Benefits [Member] Current Liabilities [Member]	Sep. 30, 2013 One-time Termination Benefits [Member] Scenario, Forecast [Member]	Feb. 07, 2013 VSP Program	Dec. 31, 2012 VSP Program	Sep. 30, 2013 Workforce Reduction Plan [Member]	Sep. 30, 2012 Workforce Reduction Plan [Member]	Sep. 30, 2013 Workforce Reduction Plan [Member]	Sep. 30, 2012 Workforce Reduction Plan [Member]	Sep. 30, 2013 Ceo Aubrey K Mcclendon [Member] McClendon Benefit Total [Member]	Sep. 30, 2012 Ceo Aubrey K Mcclendon [Member] McClendon Benefit Total [Member]	Sep. 30, 2013 Ceo Aubrey K Mcclendon [Member] McClendon Benefit Total [Member]	Sep. 30, 2012 Ceo Aubrey K Mcclendon [Member] McClendon Benefit Total [Member]	Sep. 30, 2013 VSP Program VSP Benefit Total [Member]	Sep. 30, 2012 VSP Program VSP Benefit Total [Member]	Sep. 30, 2013 VSP Program VSP Benefit Total [Member]	Sep. 30, 2012 VSP Program VSP Benefit Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated	900
Restructuring and Related Cost, Expected Cost						$ 70
Restructuring and Related Cost, Incurred Cost											31	0	31	0
Severance Costs		28	3	42	4										3	0	67	0	1	0	63	0
Payments for Restructuring							1
Restructuring and Related Cost, Expected Cost Remaining								$ 39
Number of Employees Selected for Voluntary Program										275
Number of Employees That Selected Voluntary Program									211