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Compensation and Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2019
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) | 2019 |  | 2018 |  | 2019 |  | 2018
Edison International: |  |  |  |  |  |  |
Service cost | $ | 31 |  |  | $ | 32 |  |  | $ | 95 |  |  | $ | 96 |
Non-service cost (benefit) |  |  |  |  |  |  |
Interest cost | 38 |  |  | 35 |  |  | 116 |  |  | 105 |
Expected return on plan assets | (52 | ) |  | (56 | ) |  | (156 | ) |  | (169 | )
Amortization of prior service cost | — |  |  | 1 |  |  | 1 |  |  | 2 |
Amortization of net loss 1 | 2 |  |  | 2 |  |  | 6 |  |  | 6 |
Regulatory adjustment | (4 | ) |  | 2 |  |  | (12 | ) |  | 7 |
Total non-service benefit 2 | $ | (16 | ) |  | $ | (16 | ) |  | $ | (45 | ) |  | $ | (49 | )
Total expense recognized | $ | 15 |  |  | $ | 16 |  |  | $ | 50 |  |  | $ | 47 |
SCE: |  |  |  |  |  |  |
Service cost | $ | 31 |  |  | $ | 31 |  |  | $ | 93 |  |  | $ | 93 |
Non-service cost (benefit) |  |  |  |  |  |  |
Interest cost | 35 |  |  | 32 |  |  | 106 |  |  | 96 |
Expected return on plan assets | (48 | ) |  | (52 | ) |  | (146 | ) |  | (159 | )
Amortization of prior service cost | — |  |  | 1 |  |  | 1 |  |  | 2 |
Amortization of net loss 1 | 1 |  |  | 1 |  |  | 4 |  |  | 4 |
Regulatory adjustment | (4 | ) |  | 2 |  |  | (12 | ) |  | 7 |
Total non-service benefit 2 | $ | (16 | ) |  | $ | (16 | ) |  | $ | (47 | ) |  | $ | (50 | )
Total expense recognized | $ | 15 |  |  | $ | 15 |  |  | $ | 46 |  |  | $ | 43 |
1 | Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $2 million and $2 million, respectively, for the three months ended September 30, 2019, and $6 million and $5 million, respectively, for the nine months ended September 30, 2019. The amount reclassified for Edison International and SCE was $2 million and $1 million, respectively, for the three months ended September 30, 2018, and $6 million and $4 million, respectively, for the nine months ended September 30, 2018.
2 Included in "Other income and (expense)" on Edison International's and SCE's consolidated statement of income.
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) | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost | $ | 8 |  |  | $ | 10 |  |  | $ | 24 |  |  | $ | 29 |
Non-service cost (benefit) |  |  |  |  |  |  |
Interest cost | 21 |  |  | 21 |  |  | 63 |  |  | 63 |
Expected return on plan assets | (28 | ) |  | (31 | ) |  | (84 | ) |  | (91 | )
Amortization of prior service cost | (1 | ) |  | — |  |  | (1 | ) |  | (1 | )
Amortization of net gain | — |  |  | — |  |  | (2 | ) |  | — |
Regulatory adjustment | 5 |  |  | — |  |  | 17 |  |  | — |
Total non-service benefit 1 | $ | (3 | ) |  | $ | (10 | ) |  | $ | (7 | ) |  | $ | (29 | )
Total expense | $ | 5 |  |  | $ | — |  |  | $ | 17 |  |  | $ | — |
1 Included in "Other income and (expense)" on Edison International's and SCE's consolidated statement of income.

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