Other Liabilities - Current Table (Details) - USD ($) $ in Millions	3 Months Ended
Jun. 30, 2017	Dec. 31, 2016
Other Current Liabilities [Line Items]
Revenues and royalties due others	$ 481	$ 543
Accrued drilling and production costs	259	169
Joint interest prepayments received	72	71
Accrued compensation and benefits	158	239
Other accrued taxes	58	32
Bank of New York Mellon legal accrual(a)	0	440
Other	269	304
Total other current liabilities	$ 1,297	$ 1,798
Senior Notes [Member] \| 6.775 Senior Notes due 2019 [Member]
Other Current Liabilities [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.775%
Redemption of 2019 Notes [Member] \| Senior Notes [Member] \| 6.775 Senior Notes due 2019 [Member]
Other Current Liabilities [Line Items]
Payments for Legal Settlements	$ 441

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Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Contractual interest rate for funds borrowed, under the debt agreement.

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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