v3.26.1
Compensation and Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Pension Plans    
Pension and Other Postretirement Benefits    
Service cost $ 25 $ 23
Non-service cost (benefit)    
Interest cost 48 48
Expected return on plan assets (61) (58)
Amortization of net loss (gain) 1 0
Regulatory adjustment (5) (7)
Total non-service benefit (17) (17)
Total expense 8 6
Postretirement Benefits Other Than Pensions ("PBOP")    
Pension and Other Postretirement Benefits    
Service cost 3 3
Non-service cost (benefit)    
Interest cost 10 10
Expected return on plan assets (29) (27)
Amortization of net loss (gain) (15) (20)
Regulatory adjustment 26 34
Total non-service benefit (8) (3)
Total expense (5) 0
SCE    
Non-service cost (benefit)    
Total non-service benefit (25) (21)
SCE | Pension Plans    
Pension and Other Postretirement Benefits    
Service cost 24 23
Non-service cost (benefit)    
Interest cost 45 44
Expected return on plan assets (58) (55)
Amortization of net loss (gain) 1 0
Regulatory adjustment (5) (7)
Total non-service benefit (17) (18)
Total expense $ 7 $ 5