v3.26.1
Compensation and Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension Plans        
Pension and Other Postretirement Benefits        
Service cost $ 25 $ 23 $ 50 $ 46
Non-service cost (benefit)        
Interest cost 48 48 96 96
Expected return on plan assets (61) (58) (122) (116)
Amortization of net (loss) gain 0 1 1 1
Regulatory adjustment (5) (8) (10) (15)
Total non-service benefit (18) (17) (35) (34)
Total expense 7 6 15 12
Postretirement Benefits Other Than Pensions ("PBOP")        
Pension and Other Postretirement Benefits        
Service cost 3 3 6 6
Non-service cost (benefit)        
Interest cost 10 10 20 20
Expected return on plan assets (29) (27) (58) (54)
Amortization of net (loss) gain (15) (20) (30) (40)
Regulatory adjustment 26 34 52 68
Total non-service benefit (8) (3) (16) (6)
Total expense (5) 0 (10) 0
SCE        
Non-service cost (benefit)        
Total non-service benefit (26) (21) (51) (42)
SCE | Pension Plans        
Pension and Other Postretirement Benefits        
Service cost 24 23 48 46
Non-service cost (benefit)        
Interest cost 45 45 90 89
Expected return on plan assets (58) (55) (116) (110)
Amortization of net (loss) gain 0 0 1 0
Regulatory adjustment (5) (8) (10) (15)
Total non-service benefit (18) (18) (35) (36)
Total expense $ 6 $ 5 $ 13 $ 10