Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (279)	$ (7)	$ (5)
State	(4)	4	(3)
Foreign	106	60	134
Total current income tax provision	(177)	57	126
Deferred:
Federal	7	(344)	11
State		(18)
Foreign	(72)	(64)	(74)
Total deferred income tax provision	(65)	(426)	(63)
Total income tax provision	$ (242)	$ (369)	$ 63