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Compensation and Benefit Plans (Plan Assets and Benefit Obligation) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term liabilities | $ (674) | $ (869) |
SCE |  |  |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term liabilities | (237) | (433) |
Pension Plans |  |  |
Change in projected benefit obligation |  |  |
Projected benefit obligation at beginning of year | 3,880 | 4,179 |
Service cost | 114 | 126 |
Interest cost | 155 | 141 |
Actuarial (gain) loss | 240 | (280) |
Benefits paid | (250) | (286) |
Projected benefit obligation at end of year | 4,139 | 3,880 | $ 4,179
Change in plan assets |  |  |
Fair value of plan assets at beginning of year | 3,321 | 3,616 |
Actual return on plan assets | 611 | (86) |
Employer contributions | 73 | 77 |
Benefits paid | (250) | (286) |
Fair value of plan assets at end of year | 3,755 | 3,321 | $ 3,616
Funded status at end of year | (384) | (559) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term assets | 0 | 2 |
Current liabilities | (19) | (29) |
Long-term liabilities | (365) | (532) |
Amounts recognized in the consolidated balance sheets | (384) | (559) |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Prior service cost | (1) | (1) |
Net loss | 95 | 83 |
Total amounts recognized in accumulated other comprehensive loss | 94 | 82 |
Amounts recognized as a regulatory liability | 87 | 271 |
Total not yet recognized as income | 181 | 353 |
Accumulated benefit obligation at end of year | 3,968 | 3,753 |
Pension plans with an accumulated benefit obligation in excess of plan assets: |  |  |
Projected benefit obligation | 4,139 | 3,880 |
Accumulated benefit obligation | 3,968 | 3,753 |
Fair value of plan assets | $ 3,755 | $ 3,321 |
Weighted average assumptions used to determine obligations at end of year: |  |  |
Discount rate | 3.11% | 4.19% | 3.46%
Rate of compensation increase | 4.10% | 4.10% |
Assumed health care cost trend rates: |  |  |
Gain (loss) from increase in discount rate | $ (401) | $ (277) |
Gains from other economic assumption changes | (157) |  |
Pension Plans | Edison International |  |  |
Assumed health care cost trend rates: |  |  |
Long-term payable | 133 | 117 |
Pension Plans | SCE |  |  |
Change in projected benefit obligation |  |  |
Projected benefit obligation at beginning of year | 3,431 | 3,702 |
Service cost | 110 | 121 |
Interest cost | 138 | 124 |
Actuarial (gain) loss | 199 | (273) |
Benefits paid | (216) | (243) |
Projected benefit obligation at end of year | 3,662 | 3,431 | $ 3,702
Change in plan assets |  |  |
Fair value of plan assets at beginning of year | 3,124 | 3,390 |
Actual return on plan assets | 576 | (86) |
Employer contributions | 57 | 52 |
Benefits paid | (216) | (232) |
Fair value of plan assets at end of year | 3,541 | 3,124 | 3,390
Funded status at end of year | (121) | (307) |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term assets | 0 | 0 |
Current liabilities | (2) | (5) |
Long-term liabilities | (119) | (302) |
Amounts recognized in the consolidated balance sheets | (121) | (307) |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Prior service cost | 0 | 0 |
Net loss | 17 | 17 |
Total amounts recognized in accumulated other comprehensive loss | 17 | 17 |
Amounts recognized as a regulatory liability | 87 | 271 |
Total not yet recognized as income | 104 | 288 |
Accumulated benefit obligation at end of year | 3,529 | 3,342 |
Pension plans with an accumulated benefit obligation in excess of plan assets: |  |  |
Projected benefit obligation | 3,662 | 3,431 |
Accumulated benefit obligation | 3,529 | 3,342 |
Fair value of plan assets | $ 3,541 | $ 3,124 |
Weighted average assumptions used to determine obligations at end of year: |  |  |
Discount rate | 3.11% | 4.19% |
Rate of compensation increase | 4.10% | 4.10% |
Assumed health care cost trend rates: |  |  |
Gain (loss) from increase in discount rate | $ (373) | $ (261) |
Gains from other economic assumption changes | (177) |  |
Net loss reclassified from other comprehensive loss | 37 | 21 |
Postretirement Benefits Other Than Pensions |  |  |
Change in projected benefit obligation |  |  |
Projected benefit obligation at beginning of year | 1,986 | 2,337 |
Service cost | 30 | 37 | 31
Interest cost | 77 | 80 | 86
Actuarial (gain) loss | 70 | (382) |
Plan participants' contributions | 29 | 28 |
Benefits paid | (109) | (114) |
Projected benefit obligation at end of year | 2,083 | 1,986 | 2,337
Change in plan assets |  |  |
Fair value of plan assets at beginning of year | 2,133 | 2,330 |
Actual return on plan assets | 401 | (123) |
Employer contributions | 11 | 13 |
Plan participants' contributions | 29 | 28 |
Benefits paid | (109) | (115) |
Fair value of plan assets at end of year | 2,465 | 2,133 | $ 2,330
Funded status at end of year | 382 | 147 |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term assets | 393 | 159 |
Current liabilities | (11) | (12) |
Long-term liabilities | 0 | 0 |
Amounts recognized in the consolidated balance sheets | 382 | 147 |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Net loss | 2 | 1 |
Amounts recognized as a regulatory liability | (416) | (185) |
Total not yet recognized as income | $ (414) | $ (184) |
Weighted average assumptions used to determine obligations at end of year: |  |  |
Discount rate | 3.32% | 4.35% | 3.70%
Assumed health care cost trend rates: |  |  |
Rate assumed for following year | 6.50% | 6.75% |
Ultimate rate | 5.00% | 5.00% |
Gain (loss) from increase in discount rate | $ (195) |  |
Experience gain | 137 |  |
Postretirement Benefits Other Than Pensions | SCE |  |  |
Change in projected benefit obligation |  |  |
Projected benefit obligation at beginning of year | 1,977 | $ 2,325 |
Service cost | 30 | 37 | $ 31
Interest cost | 77 | 80 | 85
Actuarial (gain) loss | 70 | (379) |
Plan participants' contributions | 29 | 28 |
Benefits paid | (109) | (114) |
Projected benefit obligation at end of year | 2,074 | 1,977 | 2,325
Change in plan assets |  |  |
Fair value of plan assets at beginning of year | 2,133 | 2,330 |
Actual return on plan assets | 401 | (123) |
Employer contributions | 10 | 12 |
Plan participants' contributions | 29 | 28 |
Benefits paid | (109) | (114) |
Fair value of plan assets at end of year | 2,464 | 2,133 | $ 2,330
Funded status at end of year | 390 | 156 |
Amounts recognized in the consolidated balance sheets consist of: |  |  |
Long-term assets | 402 | 168 |
Current liabilities | (12) | (12) |
Long-term liabilities | 0 | 0 |
Amounts recognized in the consolidated balance sheets | 390 | 156 |
Amounts recognized in accumulated other comprehensive loss consist of: |  |  |
Net loss | 0 | 0 |
Amounts recognized as a regulatory liability | (416) | (185) |
Total not yet recognized as income | $ (416) | $ (185) |
Weighted average assumptions used to determine obligations at end of year: |  |  |
Discount rate | 3.32% | 4.35% |
Assumed health care cost trend rates: |  |  |
Rate assumed for following year | 6.50% | 6.75% |
Ultimate rate | 5.00% | 5.00% |
Gain (loss) from increase in discount rate | $ (194) |  |
Experience gain | $ 135 |  |

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