Other Current Liabilities - Details of Other Current Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued operating expenses	$ 110	$ 139
Accrued exploration and development	463	637
Accrued compensation and benefits	201	166
Accrued interest	145	144
Accrued income taxes	22	47
Current asset retirement obligation	66	36
Current debt	0	1
Refundable deposits	174	0
Other	77	53
Total Other current liabilities	$ 1,258	$ 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.