Income Taxes - Components of Tax Expense (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
United States-Federal	$ (170)	$ (511)	$ 90
United States-State	57	(36)	12
Outside United States	703	648	1,085
Current Income Tax Expense (Benefit), Total	590	101	1,187
Deferred:
United States-Federal	(225)	(352)	(356)
United States-State	4	(13)	(19)
Outside United States	(47)	(51)	(52)
Valuation allowance	8	37	(14)
Deferred income taxes	(260)	(379)	(441)
Consolidated taxes on (loss) income	$ 330	$ (278)	$ 746