Leases Other supplemental information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ 354		$ 332	$ 307
Operating cash flows from finance leases	41		38	38
Financing cash flows from finance leases	37		26	24
Right-of-Use Assets Obtained in Exchange for Operating Lease Liability	487	[1]	249	433
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 64		$ 62	$ 6
Operating Lease, Weighted Average Remaining Lease Term	8 years 2 months 12 days		9 years 6 months	9 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	5.30%		5.20%	4.90%
Finance Lease, Weighted Average Remaining Lease Term	5 years 3 months 18 days		5 years 10 months 24 days	6 years 3 months 18 days

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