Long Term Debt (Details) (USD $)	9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended		9 Months Ended	12 Months Ended				12 Months Ended						12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended			12 Months Ended		9 Months Ended						5 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013 Foreign non-guarantor subsidiaries	Dec. 31, 2012 Minimum Foreign non-guarantor subsidiaries	Dec. 31, 2013 Minimum Foreign non-guarantor subsidiaries	Dec. 31, 2013 Maximum	Dec. 31, 2012 Maximum Foreign non-guarantor subsidiaries	Dec. 31, 2013 Maximum Foreign non-guarantor subsidiaries	Dec. 31, 2013 $2.5 billion RBL credit facility - due May 24, 2017	Dec. 31, 2012 $2.5 billion RBL credit facility - due May 24, 2017	Feb. 24, 2014 $2.5 billion RBL credit facility - due May 24, 2017 Subsequent event	Dec. 31, 2013 $2.5 billion RBL credit facility - due May 24, 2017 LIBOR	Dec. 31, 2013 $2.5 billion RBL credit facility - due May 24, 2017 Minimum LIBOR	Dec. 31, 2013 $2.5 billion RBL credit facility - due May 24, 2017 Minimum Alternate base rate	Dec. 31, 2013 $2.5 billion RBL credit facility - due May 24, 2017 Maximum LIBOR	Dec. 31, 2013 $2.5 billion RBL credit facility - due May 24, 2017 Maximum Alternate base rate	Dec. 31, 2013 Letter of credit	Dec. 31, 2013 $750 million senior secured term loan - due May 24, 2018	Dec. 31, 2012 $750 million senior secured term loan - due May 24, 2018	May 31, 2013 $750 million senior secured term loan - due May 24, 2018 LIBOR	Dec. 31, 2013 $750 million senior secured term loan - due May 24, 2018 LIBOR	May 31, 2013 $750 million senior secured term loan - due May 24, 2018 Minimum LIBOR	Dec. 31, 2013 $750 million senior secured term loan - due May 24, 2018 Minimum LIBOR	Dec. 31, 2013 $400 million senior secured term loan - due April 30, 2019	Dec. 31, 2012 $400 million senior secured term loan - due April 30, 2019	Dec. 31, 2013 $400 million senior secured term loan - due April 30, 2019 LIBOR	Dec. 31, 2013 $400 million senior secured term loan - due April 30, 2019 Minimum LIBOR	Dec. 31, 2012 $750 million senior secured notes - due May 1, 2019	Dec. 31, 2013 $750 million senior secured notes - due May 1, 2019	Dec. 31, 2013 $2.0 billion senior unsecured notes - due May 1, 2020	Dec. 31, 2012 $2.0 billion senior unsecured notes - due May 1, 2020	Dec. 31, 2013 $350 million senior unsecured notes - due September 1, 2022	Dec. 31, 2012 $350 million senior unsecured notes - due September 1, 2022	May 24, 2012 Predecessor	Dec. 31, 2011 Predecessor
Debt and Available Credit Facility
Borrowing capacity									$ 2,500,000,000
Face amount of debt instrument									2,500,000,000									750,000,000						400,000,000					750,000,000	2,000,000,000		350,000,000
Interest rate (as a percent)																													6.875%	9.375%		7.75%
Long-term debt	4,346,000,000	4,039,000,000							295,000,000	105,000,000								495,000,000	742,000,000					149,000,000	399,000,000			750,000,000	750,000,000	2,000,000,000	2,000,000,000	350,000,000	350,000,000
Reference rate for variable interest rate												LIBOR	LIBOR	ABR	LIBOR	ABR				LIBOR	LIBOR	LIBOR	LIBOR			LIBOR	LIBOR
Specified margin on reference rate (as a percent)												1.50%	1.50%	0.50%	2.50%	1.50%				2.75%	4.00%					3.50%
Reference rate floor for variable interest rate (as a percent)																						0.75%	1.00%				1.00%
Aggregate amount of borrowings									295,000,000		275,000,000
Letters of credit outstanding									8,000,000
Further description of credit facility including remaining capacity under the facility
Credit Facility									2,500,000,000
Interest rate (as a percent)																	1.50%
Commitment fees (as a percent)									0.375%
Remaining capacity									2,200,000,000
Deferred financing costs	134,000,000	111,000,000
Amortization of deferred financing costs	13,000,000	21,000,000																																7,000,000	3,000,000
Loss on extinguishment of debt	14,000,000	9,000,000																										14,000,000
Repayment of term loan	1,139,000,000	2,190,000,000																250,000,000						250,000,000										1,065,000,000	1,480,000,000
Effective interest rate (as a percent)																		3.50%
Debt instrument issuance as a percentage of the par value																		99.00%
Guarantees
Outstanding indebtedness			$ 0
Percentage of consolidated assets held			1.00%
Percentage of total revenues earned				5.00%	5.00%		7.00%	7.00%
Restrictive Provisions/Covenants
Debt to EBITDAX multiple						0.0475