Leases Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Cost	$ 336	$ 315
Short-term Lease, Cost	117	101
Lease, Cost	453	416
Operating Lease, Payments	325	302
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 197	$ 314
Operating Lease, Weighted Average Remaining Lease Term	6 years	7 years
Operating Lease, Weighted Average Discount Rate, Percent	3.80%	4.20%