Income Taxes - Unrecognized Tax Benefits - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Unrecognized tax balance	$ 461	$ 420	$ 387	$ 544
Unrecognized tax benefits that would impact effective tax rate	318
Interest and penalties in uncertain tax positions	6	10
Unrecognized tax benefits, interest and penalties accrued	46	39
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Income Tax Contingency [Line Items]
Unrecognized tax balance	50	$ 50
Unrecognized tax benefits that would impact effective tax rate	$ 46