Leases Maturities of lease liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2024	$ 102
2025	87
2026	68
2027	36
2028	28
Later years	148
Total lease payments	469
Less amounts representing interest	(55)
Total lease obligations	414
Finance Lease, Liability, Payment, Due [Abstract]
2024	32
2025	28
2026	26
2027	21
2028	18
Later years	75
Total lease payments	200
Less amounts representing interest	(52)
Total lease obligations	$ 148	$ 172