Income Taxes - Composition of Net Deferred Tax Asset by Jurisdiction (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Line Items]
Deferred tax assets	$ 2,964	$ 3,168
Valuation allowance	(2,062)	$ (2,127)	$ (1,778)	$ (1,684)
Deferred tax liabilities	(583)
Total	319
Domestic [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets	1,066
Valuation allowance	(965)
Deferred tax liabilities	(100)
Total	1
Foreign [Member]
Income Tax Disclosure [Line Items]
Deferred tax assets	1,898
Valuation allowance	(1,097)
Deferred tax liabilities	(483)
Total	$ 318