Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Refundable employee retention tax credit, CARES Act	$ 21
Valuation allowance	24	$ 0
Income tax paid	1,050	1,480	$ 648
Current income tax receivable	$ 370
Current income tax payable		$ 55