Income Taxes - Components of Income Tax Provision (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
United States - Federal, Current income tax expense (benefit)	$ 0	$ (4)	$ (1)
United States - Federal, Deferred income taxes and other accruals expense (benefit)	12	6	72
United States - State, Current & Deferred income taxes and other accruals expense (benefit)	3	(1)	16
United States - Current & Deferred income taxes, and other accruals expense (benefit)	15	1	87
Foreign - Current income tax expense (benefit)	478	48	447
Foreign - Deferred income taxes and other accruals expense (benefit)	107	(60)	(73)
Foreign - Current & Deferred income taxes and other accruals expense (benefit)	585	(12)	374
Provision (Benefit) For Income Taxes	$ 600	$ (11)	$ 461