Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2021	$ 36
2022	23
2023	18
2024	12
2025	6
Thereafter	9
Total lease payments	104
Less: interest	(8)
Total	96
Less: current portion	(33)	$ (28)
Long-term portion	63	76
Finance Leases
2021	1
2022	0
2023	0
2024	0
2025	0
Thereafter	1
Total lease payments	2
Less: interest	0
Total	2
Less: current portion	(1)	(1)
Long-term portion	$ 1	$ 4