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Compensation and Benefit Plans (Expense Components) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Pension and Other Postretirement Benefits |  |  |
Service cost | $ 169.0 |  |
Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 137.0 | $ 139.0 |
Interest cost | 164.0 | 171.0 |
Settlement loss | (6.4) |  |
Settlement loss, net of tax | (3.8) |  |
Other | (10.0) | (10.0) | $ (14.0)
Postretirement Benefits Other Than Pensions |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 31.0 | 35.0 | 46.0
Interest cost | 86.0 | 97.0 | 102.0
Expected return on plan assets | (110.0) | (112.0) | (116.0)
Settlement costs | 1.0 | 2.0 | 1.0
Amortization of prior service cost | (3.0) | (2.0) | (12.0)
Amortization of net loss | 0.0 | 0.0 | 3.0
Expense under accounting standards | 5.0 | 20.0 | 24.0
SCE |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 164.0 |  |
SCE | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 129.0 | 132.0 |
Interest cost | 144.0 | 150.0 |
Other | (6.0) | (6.0) | (8.0)
SCE | Postretirement Benefits Other Than Pensions |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 31.0 | 34.0 | 46.0
Interest cost | 85.0 | 97.0 | 102.0
Expected return on plan assets | (110.0) | (112.0) | (116.0)
Settlement costs | 1.0 | 2.0 | 1.0
Amortization of prior service cost | (2.0) | (2.0) | (12.0)
Amortization of net loss | 0.0 | 0.0 | 2.0
Expense under accounting standards | 5.0 | 19.0 | 23.0
Continuing Operations | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 138.0 | 139.0 | 142.0
Interest cost | 164.0 | 172.0 | 170.0
Expected return on plan assets | (212.0) | (220.0) | (233.0)
Settlement costs | 6.0 | 0.0 | 0.0
Amortization of prior service cost | 3.0 | 4.0 | 5.0
Amortization of net loss | 21.0 | 27.0 | 40.0
Expense under accounting standards | 120.0 | 122.0 | 124.0
Regulatory adjustment (deferred) | (28.0) | (21.0) | (6.0)
Total expense recognized | 92.0 | 101.0 | 118.0
Continuing Operations | SCE | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Service cost | 133.0 | 136.0 | 139.0
Interest cost | 149.0 | 156.0 | 155.0
Expected return on plan assets | (199.0) | (205.0) | (217.0)
Settlement costs | 0.0 | 0.0 | 0.0
Amortization of prior service cost | 3.0 | 4.0 | 5.0
Amortization of net loss | 17.0 | 23.0 | 35.0
Expense under accounting standards | 103.0 | 114.0 | 117.0
Regulatory adjustment (deferred) | (28.0) | (21.0) | (6.0)
Total expense recognized | $ 75.0 | $ 93.0 | $ 111.0

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