Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015
Cash (paid) received
Interest, net of amounts capitalized (1)		$ 735		$ 1,916	[1]
Income taxes, net of refunds (2)		(878)	[2]	(163)
Non-cash investing activities
Fair value of properties and equipment from non-cash transactions		2		156
Asset retirement cost additions		85		139
Accruals of property, plant, and equipment		454		858
Net liabilities assumed (divested) in acquisitions and divestitures		(39)		(84)
Non-cash investing and financing activities
Capital lease obligation (3)	[3]	10		0
Floating production, storage, and offloading unit construction period obligation (3)	[3]	11		51
Deferred drilling lease liability		3		0
Related to Net Operating Loss Carryback [Member]
Cash (paid) received
Income taxes, net of refunds (2)		$ 881
Tronox Litigation [Member] | Judicial Ruling [Member]
Cash (paid) received
Interest, net of amounts capitalized (1)				$ 1,200

[1] Includes $1.2 billion of interest related to the Tronox settlement payment in 2015.

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

[3] Upon completion of the FPSO during the third quarter of 2016, the Company reported the construction period obligation as a capital lease obligation and recorded a fair-value adjustment. See Note 8—Debt and Interest Expense.