Property, Plant and Equipment (Details) (USD $)	9 Months Ended	12 Months Ended			5 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013 Brazil operations	Dec. 31, 2012 Brazil operations	May 24, 2012 Predecessor	Dec. 31, 2011 Predecessor
Unproved Oil and Natural Gas Properties (Successor)
Property, plant, and equipment associated with unproven oil and natural gas properties	$ 2,300,000,000	$ 1,400,000,000
Transfer from unproved properties to proved properties		800,000,000
Amortization of unproved leasehold costs	23,000,000	36,000,000
Asset Retirement Obligations
Credit-adjusted risk-free rate (as a percent)		7.00%
Projected inflation rate (as a percent)		2.50%
Changes in net asset retirement liability
Net asset retirement liability at the beginning of period		44,000,000
Fair value of asset retirement liability at Acquisition date	102,000,000
Liabilities settled	(2,000,000)	(2,000,000)
Property sales	(64,000,000)	(1,000,000)
Accretion expense	3,000,000	4,000,000
Liabilities incurred	5,000,000	7,000,000
Other		1,000,000
Net asset retirement liability at the end of period	44,000,000	53,000,000
Net asset retirement liability of discontinued operations			37,000,000	36,000,000
Capitalized Interest
Capitalized interest	$ 12,000,000	$ 19,000,000			$ 4,000,000	$ 13,000,000