Leases (Future Minimum Maturities of Lease Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Leases
2023	$ 4,657
2024	4,203
2025	3,543
2026	2,830
2027	2,302
Thereafter	8,933
Total lease payments	26,468
Less: imputed interest	(4,262)
Total	22,206	$ 22,349
Finance Leases
2023	315
2024	306
2025	315
2026	291
2027	290
Thereafter	1,032
Total lease payments	2,549
Less: imputed interest	(732)
Total	$ 1,817	$ 1,569