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Compensation and Benefit Plans | 3 Months Ended
--- | ---
Mar. 31, 2021
Retirement Benefits [Abstract] |
Compensation and Benefit Plans | Note 9.Compensation and Benefit Plans Pension Plans Net periodic pension expense components are: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​
​ | Three months ended March 31,
(in millions) | 2021 |  | 2020
Edison International: | ​ | ​ | ​ | ​ | ​
Service cost | $ | 34 | ​ | $ | 31
Non-service cost (benefit) |  |  | ​ |  |
Interest cost |  | 26 | ​ |  | 31
Expected return on plan assets |  | (56) | ​ |  | (54)
Amortization of net loss1 |  | 3 | ​ |  | 3
Regulatory adjustment |  | 4 | ​ |  | 2
Total non-service benefit2 | $ | (23) | ​ | $ | (18)
Total expense recognized | $ | 11 | ​ | $ | 13
SCE: | ​ | ​ | ​ | ​ | ​
Service cost | $ | 33 | ​ | $ | 30
Non-service cost (benefit) |  | ​ | ​ |  | ​
Interest cost |  | 24 | ​ |  | 28
Expected return on plan assets |  | (53) | ​ |  | (51)
Amortization of net loss1 |  | 2 | ​ |  | 2
Regulatory adjustment |  | 4 | ​ |  | 2
Total non-service benefit2 | $ | (23) | ​ | $ | (19)
Total expense recognized | $ | 10 | ​ | $ | 11
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.
Postretirement Benefits Other Than Pensions ("PBOP") Net periodic PBOP expense components for Edison International and SCE are:
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
​ | Three months ended March 31,
(in millions) | 2021 |  | 2020
Service cost | $ | 10 | ​ | $ | 9
Non-service cost (benefit) |  |  | ​ |  |
Interest cost |  | 14 | ​ |  | 17
Expected return on plan assets |  | (27) | ​ |  | (30)
Amortization of net gain |  | (8) | ​ |  | (4)
Regulatory adjustment |  | 11 | ​ |  | 8
Total non-service benefit1 | $ | (10) | ​ | $ | (9)
Total expense | $ | — | ​ | $ | —
1 | Included in "Other income" on Edison International’s and SCE’s consolidated statement of income.
​

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