Leases - Schedule of Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lease Costs:
Operating lease cost	$ 319	$ 304	$ 280
Variable lease cost	58	57	55
Lease, Cost, Total	$ 377	$ 360	$ 335