Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Cash paid (received)
Interest, net of amounts capitalized		$ 308	$ 299
Income taxes, net of refunds		1	(8)
Non-cash investing activities
Fair value of properties and equipment from non-cash transactions		549	0
Asset retirement cost additions		61	27
Accruals of property, plant, and equipment		608	623
Net liabilities assumed (divested) in acquisitions and divestitures		(82)	0
Non-cash investing and financing activities
FPSO construction period obligation	[1]	0	2
Deferred drilling lease liability		$ 7	$ 0

[1] Upon completion of the FPSO in the third quarter of 2016, the Company reported the construction period obligation as a capital lease obligation based on the fair value of the FPSO.