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Commitments and Contingencies - Unrecorded Unconditional Purchase Obligations (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 $ 31
2023 17
2024 13
2025 17
2026 6
2027 and thereafter 21
Unrecorded unconditional purchase obligation 105
Purchase obligations - energy purchase obligations $ 31