Income Taxes - Schedule of Expiration Periods of Deferred Tax Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	$ 3,226
Tax credit carryforwards	358
Other	493
Valuation allowance	(2,279)	$ (2,307)	$ (2,121)	$ (2,357)
Deferred tax assets, net	1,798	$ 1,798
Expires within 10 years
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	422
Tax credit carryforwards	278
Other	0
Valuation allowance	(637)
Deferred tax assets, net	63
Expires within 11-20 years
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	580
Tax credit carryforwards	66
Other	0
Valuation allowance	(293)
Deferred tax assets, net	353
No expiration
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	2,224
Tax credit carryforwards	14
Other	424
Valuation allowance	(1,329)
Deferred tax assets, net	1,333
Other
Tax Credit Carryforward [Line Items]
Tax loss carryforwards	0
Tax credit carryforwards	0
Other	69
Valuation allowance	(20)
Deferred tax assets, net	$ 49