v3.26.1
Commitments and Contingencies - Environmental Remediation (Details) - SCE
$ in Millions
 3 Months Ended
Mar. 31, 2026
USD ($)
site
Mar. 31, 2025
USD ($)
Commitments and Contingencies    
Recorded estimated minimum liability $ 222  
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Other deferred credits and other long-term liabilities  
Environmental remediation regulatory assets $ 212  
Expected recovery from incentive mechanism $ 34  
Expected recovery from incentive mechanism (as a percent) 90.00%  
Recovery through customer rates $ 178  
Recovery through customer rates (as a percent) 100.00%  
Clean up over a period 35 years  
Expected remediation costs, low end of range $ 7  
Expected remediation costs, high end of range 21  
Environmental remediation expense $ 2 $ 4
Material sites    
Commitments and Contingencies    
Identified remediation sites (number) | site 19  
Minimum estimated liability $ 1  
Recorded estimated minimum liability 217  
Cost may exceed liability 98  
Material sites | San Onofre    
Commitments and Contingencies    
Recorded estimated minimum liability $ 147  
Immaterial sites    
Commitments and Contingencies    
Identified remediation sites (number) | site 14  
Recorded estimated minimum liability $ 5  
Cost may exceed liability $ 2