Leases - Lease Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2020	$ 4
2021	4
2022	3
2023	1
2024	1
Thereafter	2
Total minimum lease payments	15
Less: amount of lease payments representing interest	$ 1
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Liabilities	Liabilities
Present value of future minimum lease payments	$ 14
Less: current obligations under leases	4	$ 4
Long-term lease obligations	$ 10	$ 11
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current	Accrued Liabilities, Current
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other non-current liabilities	Other non-current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other non-current liabilities	Other non-current liabilities
Finance Leases
2020	$ 7
2021	7
2022	8
2023	8
2024	8
Thereafter	21
Total minimum lease payments	59
Less: amount of lease payments representing interest	9
Present value of future minimum lease payments	50	$ 55
Less: current obligations under leases	5	5
Long-term lease obligations	$ 45	$ 50