Leases - Maturity of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Maturity of Lease Liabilities, Finance Leases
2022	$ 11
2023	11
2024	11
2025	10
Total lease payments	43
Less: Interest	3
Finance lease liabilities	40	$ 44
Maturity of Lease Liabilities, Operating Leases
2022	68
2023	61
2024	51
2025	45
2026	38
Thereafter	104
Total lease payments	367
Less: Interest	26
Operating lease liability	$ 341	$ 254