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v3.20.2

Compensation and Benefit Plans (Expense Components) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Pension Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
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 | 0 | 0 | 1 | 1
Amortization of net (loss) gain | 3 | 2 | 9 | 6
Regulatory adjustment | 2 | (4) | 6 | (12)
Total non-service cost (benefit) | (19) | (16) | (55) | (45)
Total expense recognized | 12 | 15 | 38 | 50
PBOP Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
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 net (loss) gain | (5) | 0 | (13) | (2)
Regulatory adjustment | 8 | 5 | 24 | 17
Total non-service cost (benefit) | (10) | (3) | (28) | (7)
Total expense | 0 | 5 | 0 | 17
Southern California Edison |  |  |  |
Non-service cost (benefit) |  |  |  |
Total non-service cost (benefit) | (28) | (19) | (83) | (54)
Southern California Edison | Pension Plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
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 | 0 | 0 | 1 | 1
Amortization of net (loss) gain | 2 | 1 | 6 | 4
Regulatory adjustment | 2 | (4) | 6 | (12)
Total non-service cost (benefit) | (18) | (16) | (55) | (47)
Total expense recognized | 13 | 15 | 36 | 46
Southern California Edison | PBOP Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
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 (loss) gain | (5) | 0 | (13) | (2)
Regulatory adjustment | 8 | 5 | 24 | 17
Total non-service cost (benefit) | (10) | (3) | (28) | (7)
Total expense | $ 0 | $ 5 | $ 0 | $ 17

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