Contingencies and Commitments - Additional Information Narrative (Details) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended					12 Months Ended						1 Months Ended	12 Months Ended		3 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended
	Jan. 30, 2012	Apr. 30, 2011	Mar. 31, 2013 Shareholder_Actions acre	Mar. 30, 2012	Mar. 31, 2012	Mar. 31, 2013 Fair Value Amount Remianing [Member]	Mar. 31, 2013 Chesapeake Utica L.L.C well	Dec. 31, 2012 Chesapeake Utica L.L.C well	Mar. 31, 2013 Clean Energy Fuels Corp.	Jul. 31, 2011 Clean Energy Fuels Corp.	Jul. 11, 2011 Clean Energy Fuels Corp.	Mar. 31, 2013 Sundrop Fuels, Inc.	Jul. 31, 2011 Sundrop Fuels, Inc.	Dec. 31, 2011 Chesapeake Midstream Development, L.P	Dec. 31, 2012 Chesapeake Midstream Development, L.P	Dec. 31, 2012 Chesapeake Midstream Development, L.P EBITD Minimum Committed Amount In 2012	Mar. 31, 2013 Chesapeake Midstream Development, L.P EBITD Minimum Committed Amount In 2013	Mar. 31, 2013 Civil Penalties	Mar. 31, 2013 Rigs	Dec. 31, 2012 Rigs Oilfield Services	Sep. 30, 2012 Equipment Rigs	Sep. 30, 2012 Equipment Maximum	Sep. 30, 2012 Equipment Minimum	Mar. 31, 2013 Compressor Leases Rigs Compressor	Mar. 31, 2013 Drilling Obligations
Commitments and Contingencies [Line Items]
Interest paid			$ 12,000,000
Attorney fees and expenses to plaintiffs' counsel	3,750,000
Stay Period			30 days
Maximum working interest percentage allowed			2.50%
Loss Contingency, New Claims Filed, Number			13
Civil penalties																		37,500
Loss Contingency, Range of Possible Loss			100,000
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																			26					238
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment																				282,000,000
Number Of Drilling Rigs Leased																					18
Lease Term																						3 years	1 year
Operating Leases, Future Minimum Payments Due																					145,000,000			384,000,000
Proceeds from Sale of Property, Plant, and Equipment			165,000,000	59,000,000										884,000,000
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								217
Drilling carrying percentage, previous amount																									60.00%
Drilling carrying percentage, current amount																									45.00%
Capital Expenditures Incurred but Not yet Paid			85,000,000
Net Acreage Shortfall			13,000
Cash Payment for Shortfall			26,000,000
Guaranteed gross profit margin		10.00%
Investment in newly issued convertible notes									50,000,000	150,000,000	50,000,000
Investment in preferred stock												115,000,000	155,000,000
EBITDA minimum commitment amount																100,000,000	150,000,000
Gain (Loss) on Sale of Property Plant Equipment			49,000,000		2,000,000	18,000,000									27,000,000
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest																$ 1,000,000
Numbr of Misdemeanor Counts			3