Leases Maturities of lease liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2023	$ 97
2024	87
2025	74
2026	60
2027	30
Later years	162
Total lease payments	510
Less amounts representing interest	(63)
Total lease obligations	447
Finance Lease, Liability, Payment, Due [Abstract]
2023	34
2024	31
2025	27
2026	26
2027	22
Later years	91
Total lease payments	231
Less amounts representing interest	(59)
Total lease obligations	$ 172	$ 173