Leases (Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Lease [Member]
Lessee Lease Description [Line Items]
Cash flows from operating activities - operating leases	$ 1,135	$ 1,119	$ 1,135
Cash flow from investing activities	758	500	291
Operating right-of-use assets obtained in exchange for new lease liabilities	2,161	1,997	1,405
Finance Lease Paid To Equity Company [Member]
Lessee Lease Description [Line Items]
Cash flows from operating activities - finance leases	20	20	20
Finance Lease Paid To Third Parties [Member]
Lessee Lease Description [Line Items]
Cash flow from financing activities	86	149	110
Finance right-of-use assets obtained in exchange for new lease liabilities	$ 529	$ 73	$ 200