Leases (Future Minimum Maturities of Lease Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Operating Leases
Remainder of 2023	$ 3,537
2024	4,309
2025	3,652
2026	2,942
2027	2,415
Thereafter	9,427
Total lease payments	26,282
Less: imputed interest	(4,339)
Total	21,943	$ 22,206
Finance Leases
Remainder of 2023	273
2024	364
2025	367
2026	309
2027	306
Thereafter	1,091
Total lease payments	2,710
Less: imputed interest	(743)
Total	$ 1,967	$ 1,817