Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Cash paid (received)
Interest, net of amounts capitalized		$ 449	$ 427
Income taxes, net of refunds (1)	[1]	162	(883)
Non-cash investing activities
Fair value of properties and equipment from non-cash transactions		553	3
Asset retirement cost additions		138	49
Accruals of property, plant, and equipment		696	505
Net liabilities assumed (divested) in acquisitions and divestitures		(100)	(36)
Non-cash investing and financing activities
FPSO construction period obligation	[2]	0	11
Deferred drilling lease liability		$ 13	0
Net Operating Loss Carryback [Member]
Cash paid (received)
Income taxes, net of refunds (1)			$ 881

[1] Includes $881 million from a tax refund in 2016 related to the income tax benefit associated with the Company’s 2015 tax net operating loss carryback.

[2] 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.