Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0	$ 0	$ 0	$ 416,000,000
Unrecognized tax benefits, decrease in prior year tax positions	$ 416,000,000