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Commitments and Contingencies - Future Undiscounted Minimum Cash Payment Obligations for Financing Lease Liabilities (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Finance Lease, Liability, Payment, Due [Abstract]  
2022 $ 6
2023 6
2024 6
2025 4
2026 0
Thereafter 0
Total undiscounted future lease payments 22
Present value adjustment (1)
Net financing lease liabilities $ 21