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Compensation and Benefit Plans (Expenses) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | $ 120 | $ 130 | $ 121
Non-service cost (benefit) |  |  |
Interest cost | 111 | 103 | 124
Expected return on plan assets | (227) | (222) | (215)
Settlement costs | 4 |  |
Amortization of prior service cost |  | 1 | 2
Amortization of net (gain) loss | 5 | 11 | 10
Regulatory adjustment | 6 | 25 | 16
Total non-service benefit | (101) | (82) | (63)
Total expense recognized | 19 | 48 | 58
Postretirement Benefits Other Than Pensions |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 34 | 40 | 38
Non-service cost (benefit) |  |  |
Interest cost | 56 | 52 | 63
Expected return on plan assets | (97) | (106) | (119)
Amortization of prior service cost | (2) | (1) | (1)
Amortization of net (gain) loss | (45) | (35) | (29)
Regulatory adjustment | 55 | 51 | 49
Total non-service benefit | (33) | (39) | (37)
Total expense | 1 | 1 | 1
SCE |  |  |
Non-service cost (benefit) |  |  |
Total non-service benefit | (136) | (123) | (102)
SCE | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 118 | 127 | 119
Non-service cost (benefit) |  |  |
Interest cost | 101 | 95 | 114
Expected return on plan assets | (215) | (211) | (203)
Settlement costs | 4 |  |
Amortization of prior service cost |  | 1 | 1
Amortization of net (gain) loss | 2 | 7 | 7
Regulatory adjustment | 6 | 25 | 16
Total non-service benefit | (102) | (83) | (65)
Total expense recognized | 16 | 44 | 54
SCE | Postretirement Benefits Other Than Pensions |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 34 | 40 | 37
Non-service cost (benefit) |  |  |
Interest cost | 55 | 52 | 63
Expected return on plan assets | (97) | (106) | (119)
Amortization of prior service cost | (2) | (1) | (1)
Amortization of net (gain) loss | (45) | (36) | (29)
Regulatory adjustment | 55 | 51 | 49
Total non-service benefit | $ (34) | $ (40) | $ (37)

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