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Commitments and Contingencies (Unrecorded) (Details) - SCE - Power Purchase Agreement - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Unrecorded Unconditional Purchase Obligation [Line Items]      
2023 $ 29    
2024 123    
2025 171    
2026 182    
2027 186    
Thereafter 1,864    
Long-term lease expense 393    
Purchase cost $ 5,100 $ 4,700 $ 3,800