Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Operating Lease, Right-of-Use Asset	$ 435	$ 458
Operating Lease, Liability, Current	Other current liabilities	Other current liabilities
Operating Lease, Liability, Noncurrent	$ 389	$ 401
Operating Lease, Liability, Noncurrent	Other long-term liabilities	Other long-term liabilities
Operating Lease, Weighted Average Remaining Lease Term	10 years	11 years
Operating Lease, Weighted Average Discount Rate, Percent	2.60%	2.40%
Operating Lease, Cost	$ 90	$ 92
Operating Lease, Payments	87	91
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	68	202
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months	86
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	69
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three	56
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four	49
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five	40
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five	228
Lessee, Operating Lease, Liability, to be Paid	528
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(68)
Operating Lease, Liability	460
Other Noncurrent Assets [Member]
Operating Leased Assets [Line Items]
Operating Lease, Right-of-Use Asset	435	458	$ 336
Other Current Liabilities [Member]
Operating Leased Assets [Line Items]
Operating Lease, Liability, Current	71	70
Other Noncurrent Liabilities [Member]
Operating Leased Assets [Line Items]
Operating Lease, Liability, Noncurrent	$ 389	$ 401
Minimum [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Term of Contract	55 years
Lessee, Operating and Finance Leases, Option to Extend	15 years