Other Current Liabilities - Details of Other Current Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued operating expenses	$ 117	$ 139
Accrued exploration and development	495	637
Accrued compensation and benefits	147	166
Accrued interest	109	144
Accrued income taxes	66	47
Current debt	1	1
Current asset retirement obligation	36	36
Other	100	53
Total other current liabilities	$ 1,071	$ 1,223	[1]

[1] Financial information for 2015 has been recast to reflect retrospective application of the successful efforts method of accounting. See Note 1.