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Compensation and Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2020
PBOP Plan |
Defined Benefit Plan Disclosure [Line Items] |
Expense Components for Plans | Net periodic PBOP expense components for Edison International and SCE are:
| Three months ended September 30, |  |  |  | Nine months ended September 30, |  |  |  |  |
(in millions) | 2020 |  | 2019 |  | 2020 |  | 2019 |  |  |
Service cost | $ | 10 |  |  | $ | 8 |  |  | $ | 28 |  |  | $ | 24 |  |  |  |
Non-service cost (benefit) |  |  |  |  |  |  |  |  |  |
Interest cost | 17 |  |  | 21 |  |  | 51 |  |  | 63 |  |  |  |
Expected return on plan assets | (29) |  |  | (28) |  |  | (89) |  |  | (84) |  |  |  |
Amortization of prior service cost | (1) |  |  | (1) |  |  | (1) |  |  | (1) |  |  |  |
Amortization of net gain | (5) |  |  | — |  |  | (13) |  |  | (2) |  |  |  |
Regulatory adjustment | 8 |  |  | 5 |  |  | 24 |  |  | 17 |  |  |  |
Total non-service benefit1 | $ | (10) |  |  | $ | (3) |  |  | $ | (28) |  |  | $ | (7) |  |  |  |
Total expense | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 17 |  |  |  |
1 Included in "Other income" on Edison International's and SCE's consolidated statement of income.
Southern California Edison | Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Expense Components for Plans | Net periodic pension expense components are:
| Three months ended September 30, |  |  |  | Nine months ended September 30, |  |  |  |  |  |
(in millions) | 2020 |  | 2019 |  | 2020 |  | 2019 |  |  |  |
Edison International: |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 31 |  |  | $ | 31 |  |  | $ | 93 |  |  | $ | 95 |  |  |  |  |
Non-service cost (benefit) |  |  |  |  |  |  |  |  |  |  |
Interest cost | 31 |  |  | 38 |  |  | 92 |  |  | 116 |  |  |  |  |
Expected return on plan assets | (55) |  |  | (52) |  |  | (163) |  |  | (156) |  |  |  |  |
Amortization of prior service cost | — |  |  | — |  |  | 1 |  |  | 1 |  |  |  |  |
Amortization of net loss1 | 3 |  |  | 2 |  |  | 9 |  |  | 6 |  |  |  |  |
Regulatory adjustment | 2 |  |  | (4) |  |  | 6 |  |  | (12) |  |  |  |  |
Total non-service benefit2 | $ | (19) |  |  | $ | (16) |  |  | $ | (55) |  |  | $ | (45) |  |  |  |  |
Total expense recognized | $ | 12 |  |  | $ | 15 |  |  | $ | 38 |  |  | $ | 50 |  |  |  |  |
SCE: |  |  |  |  |  |  |  |  |  |  |
Service cost | $ | 31 |  |  | $ | 31 |  |  | $ | 91 |  |  | $ | 93 |  |  |  |  |
Non-service cost (benefit) |  |  |  |  |  |  |  |  |  |  |
Interest cost | 29 |  |  | 35 |  |  | 85 |  |  | 106 |  |  |  |  |
Expected return on plan assets | (51) |  |  | (48) |  |  | (153) |  |  | (146) |  |  |  |  |
Amortization of prior service cost | — |  |  | — |  |  | 1 |  |  | 1 |  |  |  |  |
Amortization of net loss1 | 2 |  |  | 1 |  |  | 6 |  |  | 4 |  |  |  |  |
Regulatory adjustment | 2 |  |  | (4) |  |  | 6 |  |  | (12) |  |  |  |  |
Total non-service benefit2 | $ | (18) |  |  | $ | (16) |  |  | $ | (55) |  |  | $ | (47) |  |  |  |  |
Total expense recognized | $ | 13 |  |  | $ | 15 |  |  | $ | 36 |  |  | $ | 46 |  |  |  |  |
1 Represents the amount of net loss reclassified from other comprehensive loss. 2 Included in "Other income" on Edison International's and SCE's consolidated statement of income.

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