Lease Commitments - ASC 842 (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Leases
2023	$ 1,171
2024	902
2025	633
2026	391
2027	252
Thereafter	1,042
Total	4,391
Less: Amounts representing interest	360
Total lease liabilities	4,031	$ 3,503
Finance Leases
2023	61
2024	61
2025	57
2026	54
2027	47
Thereafter	269
Total	549
Less: Amounts representing interest	101
Total lease liabilities	$ 448	$ 497