Leases - Maturities of Operating and Finance Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022	$ 215
2023	131
2024	84
2025	54
2026	24
Thereafter	140
Total lease payments	648
Less: Interest	112
Operating lease liabilities	536	$ 707
Finance Leases
2022	49
2023	18
2024	2
2025	1
2026	1
Thereafter	1
Total lease payments	72
Less: Interest	1
Present value of lease liabilities	$ 71	$ 37