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Compensation and Benefit Plans | 9 Months Ended
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Sep. 30, 2019
Retirement Benefits [Abstract] |
Compensation and Benefit Plans | Compensation and Benefit Plans Pension 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. Postretirement Benefits Other Than Pensions ("PBOP") 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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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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