Income Taxes - Schedule of Expiration Periods of Deferred Tax Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	$ 1,554
Tax credit carryforwards	26	$ 27
Other	1,384
Valuation allowance	(2,062)	(2,127)	$ (1,778)	$ (1,684)
Total	902	$ 1,041
Expires Within 10 Years [Member]
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	232
Tax credit carryforwards	17
Valuation allowance	(249)
Expires Within 11-20 Years [Member]
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	366
Tax credit carryforwards	9
Valuation allowance	(374)
Total	1
No Expiration [Member]
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	956
Other	265
Valuation allowance	(958)
Total	263
Other [Member]
Tax Credit Carryforward [Line Items]
Other	1,119
Valuation allowance	(481)
Total	$ 638