Contingencies and Commitments - Commitments Narrative (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended		9 Months Ended				1 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended		3 Months Ended				9 Months Ended					3 Months Ended		9 Months Ended		3 Months Ended
	Apr. 30, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Fair Value Amount Remianing [Member]	Sep. 30, 2013 Scenario, Forecast [Member]	Dec. 31, 2011 Chesapeake Utica L L C [Member] well	Sep. 30, 2013 Chesapeake Utica L L C [Member] well	Sep. 30, 2013 Sundrop Fuels, Inc.	Jul. 31, 2011 Sundrop Fuels, Inc.	Dec. 31, 2011 Chesapeake Midstream Development, L.P	Sep. 30, 2013 Chesapeake Midstream Development, L.P	Dec. 31, 2012 Chesapeake Midstream Development, L.P Year of 2012 [Member]	Sep. 30, 2013 Chesapeake Midstream Development, L.P Year of 2013 [Member]	Sep. 30, 2013 Minimum Chesapeake Utica L L C [Member]	Sep. 30, 2013 Maximum Chesapeake Utica L L C [Member]	Dec. 31, 2012 Net Acreage Shortfall [Member] acre	Sep. 30, 2013 Net Acreage Shortfall [Member] Scenario, Forecast [Member] acre	Sep. 30, 2013 Rigs	Dec. 31, 2013 Rigs Subsequent Event [Member]	Dec. 31, 2013 Rigs Scenario, Forecast [Member] Subsequent Event [Member]	Dec. 31, 2013 Rigs Minimum Scenario, Forecast [Member] Subsequent Event [Member]	Sep. 30, 2013 Equipment Rigs	Sep. 30, 2013 Equipment Minimum	Sep. 30, 2013 Equipment Maximum	Sep. 30, 2013 Compressor Leases Compressor	Sep. 30, 2013 Compressor Leases Minimum	Sep. 30, 2013 Compressor Leases Maximum	Sep. 30, 2013 Gas Gathering and Processing Equipment [Member]	Sep. 30, 2012 Gas Gathering and Processing Equipment [Member]	Sep. 30, 2013 Gas Gathering and Processing Equipment [Member]	Sep. 30, 2012 Gas Gathering and Processing Equipment [Member]	Sep. 30, 2013 Assets Held-for-sale [Member] Gas Gathering and Processing Equipment [Member]
Long-term Purchase Commitment [Line Items]
Equipment sold																				94							2,558
Master Lease Agreement Miinimum Term (in years)																				5 years								4 years
Master Lease Agreement Maximum Term (in years)																				10 years									10 years
Number of repurchased equipment																				28	9						250
Property Subject to or Available for Operating Lease, Number of Units																								11
Lease Term																									1 year	3 years
Operating Leases, Future Minimum Payments Due																				$ 239			$ 58	$ 82			$ 348
Payments to Acquire Property, Plant, and Equipment																						70
Proceeds from Sale of Property, Plant, and Equipment												884
Minimum committed wells per year								90
Minimum committed wells per year, year one								270
Minimum committed wells per year, year two								540
Number of spud wells									357
Drilling carrying percentage, previous amount																	60.00%
Drilling carrying percentage, current amount																45.00%
Other Commitment		50		50
Impairment of Long-Lived Assets to be Disposed of																																		26
Net Acreage Shortfall																		13,000	14,000
Cash Payment for Shortfall							28
Amount Payable On Each Short Of Drilling Commitment		0
Guaranteed gross profit margin	10.00%
Investment in preferred stock										115	155
EBITDA minimum commitment amount														100	150
Gain (Loss) on Sale of Property Plant Equipment		132	(7)	290	(5)	8						27																		132	7	311	8
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest													$ 11