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Commitments and Contingencies - Schedule of Wildfire-Related Claims, Net of Expected Recoveries (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Commitments and Contingencies          
Wildfire-related claims     $ 321    
Accrued estimated losses $ 554   554   $ 1,001
Wildfire-related claims, net of (recoveries) 295 $ 1 (1,010) $ 616  
Subsidiary of Common Parent          
Commitments and Contingencies          
Wildfire-related claims     50 1  
SCE          
Commitments and Contingencies          
Wildfire-related claims 295   316 674  
Expected recoveries from insurance and third parties     (82) (60)  
Customer-funded wildfire self-insurance (279)   (279)    
Expected (recoveries from)/refund to CPUC customers     (1,297)    
Expected recoveries from FERC customers (16)   (13) (34)  
Total pre-tax (gain) charge 0   (1,355) 580  
Income tax expense (benefit) 0   379 (163)  
Total after-tax (gain) charge 0   (976) 417  
Accrued estimated losses         1,001
Wildfire-related claims, net of (recoveries) 295 $ 0 (1,060) 614  
SCE | Subsidiary of Common Parent          
Commitments and Contingencies          
Wildfire-related claims     3    
2017/2018 Wildfire/Mudslide Events          
Commitments and Contingencies          
Wildfire-related claims     0    
Accrued estimated losses 218   218   426
2017/2018 Wildfire/Mudslide Events | SCE          
Commitments and Contingencies          
Wildfire-related claims 0   0 490  
Expected recoveries from insurance and third parties     0 0  
Customer-funded wildfire self-insurance 0   0    
Expected (recoveries from)/refund to CPUC customers     (1,341)    
Expected recoveries from FERC customers 0   0 (27)  
Total pre-tax (gain) charge 0   (1,341) 463  
Income tax expense (benefit) 0   375 (130)  
Total after-tax (gain) charge 0   (966) 333  
Accrued estimated losses         426
Other Wildfire Events | Subsidiary of Common Parent          
Commitments and Contingencies          
Wildfire-related claims     47    
Other Wildfire Events | SCE          
Commitments and Contingencies          
Wildfire-related claims 0   21 184  
Expected recoveries from insurance and third parties     (82) (60)  
Customer-funded wildfire self-insurance 0   0    
Expected (recoveries from)/refund to CPUC customers     44    
Expected recoveries from FERC customers 0   3 (7)  
Total pre-tax (gain) charge 0   (14) 117  
Income tax expense (benefit) 0   4 (33)  
Total after-tax (gain) charge 0   (10) $ 84  
Eaton Fire          
Commitments and Contingencies          
Wildfire-related claims     300    
Accrued estimated losses 75   75   $ 0
Eaton Fire | SCE          
Commitments and Contingencies          
Wildfire-related claims 295   295    
Expected recoveries from insurance and third parties     0    
Customer-funded wildfire self-insurance (279)   (279)    
Expected (recoveries from)/refund to CPUC customers     0    
Expected recoveries from FERC customers (16)   (16)    
Total pre-tax (gain) charge 0   0    
Income tax expense (benefit) 0   0    
Total after-tax (gain) charge 0   0    
Accrued estimated losses $ 5   $ 5