Leases (Maturity of Lease Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating leases
2024	$ 295
2025	259
2026	219
2027	168
2028	115
Thereafter	275
Total	1,331
Less amount representing interest	(187)
Present value of lease liabilities	1,144
Finance leases
2024	61
2025	54
2026	40
2027	24
2028	6
Thereafter	44
Total	229
Less amount representing interest	(37)
Present value of lease liabilities	$ 192	$ 123