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Variable Interest Entities (Details) (Southern California Edison, USD $) | 3 Months Ended | 6 Months Ended | 1 Months Ended |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 3 Months Ended |  | 3 Months Ended | 6 Months Ended
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Jun. 30, 2014 SCE Trust I | Jun. 30, 2013 SCE Trust I | Jun. 30, 2014 SCE Trust I | Jun. 30, 2013 SCE Trust I | May 31, 2012 SCE Trust I Trust Securities | Jun. 30, 2014 SCE Trust I Trust Securities | Dec. 31, 2013 SCE Trust I Trust Securities | Jun. 30, 2014 SCE Trust I Series F Preferred Stock | Dec. 31, 2013 SCE Trust I Series F Preferred Stock | May 31, 2012 SCE Trust I Series F Preferred Stock | Jun. 30, 2014 SCE Trust II | Jun. 30, 2013 SCE Trust II | Jun. 30, 2014 SCE Trust II | Jun. 30, 2013 SCE Trust II | Dec. 31, 2013 SCE Trust II Trust Securities | Jun. 30, 2014 SCE Trust II Trust Securities | Jan. 31, 2013 SCE Trust II Trust Securities | Jun. 30, 2014 SCE Trust II Series G Preferred Stock | Dec. 31, 2013 SCE Trust II Series G Preferred Stock | Jan. 31, 2013 SCE Trust II Series G Preferred Stock | Jun. 30, 2014 SCE Trust III | Jun. 30, 2014 SCE Trust III | Jun. 30, 2014 SCE Trust III Trust Securities | Mar. 31, 2014 SCE Trust III Series H Preferred Stock | Jun. 30, 2014 SCE Trust III Series H Preferred Stock | Jun. 30, 2014 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW | Jun. 30, 2013 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW | Jun. 30, 2014 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW | Jun. 30, 2013 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW
Variable Interest Entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entities, Dividend Income | $ 6,000,000 | $ 6,000,000 | $ 13,000,000 | $ 13,000,000 |  |  |  |  |  |  | $ 5,000,000 | $ 5,000,000 | $ 10,000,000 | $ 9,000,000 |  |  |  |  |  |  | $ 4,000,000 | $ 5,000,000 |  |  |  |  |  |  |
Variable Interest Entities, Dividend Distributions | 6,000,000 | 6,000,000 | 13,000,000 | 13,000,000 |  |  |  |  |  |  | 5,000,000 | 5,000,000 | 10,000,000 | 9,000,000 |  |  |  |  |  |  | 4,000,000 | 5,000,000 |  |  |  |  |  |  |
Details of projects or entities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Power generating capacity (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,341 | 4,057 | 5,341 | 4,057
Payments to unconsolidated VIEs for power purchase contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 93,000,000 | 99,000,000 | 207,000,000 | 197,000,000
Future Power Generating Capacity of Projects Owned Controlled |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 299 |  | 299 |
Unconsolidated Trust |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  |  |  | 5.625% |  |  |  |  |  |  |  |  |  | 5.10% |  |  |  |  |  |  |  | 5.75% | 5.75% |  |  |  |  |
Liquidation preference |  |  |  |  | 475,000,000 | 475,000,000 | 475,000,000 | 475,000,000 | 475,000,000 |  |  |  |  |  | 400,000,000 | 400,000,000 | 400,000,000 | 400,000,000 | 400,000,000 |  |  |  | 275,000,000 |  | 275,000,000 |  |  |  |
Liquidation value (in dollars per share) |  |  |  |  | $ 25 |  |  |  |  | $ 2,500 |  |  |  |  |  |  | $ 25 |  |  | $ 2,500 |  |  | $ 25 | $ 2,500 | $ 2,500 |  |  |  |
Common stock |  |  |  |  | $ 10,000 | $ 10,000 | $ 10,000 |  |  |  |  |  |  |  | $ 10,000 | $ 10,000 | $ 10,000 |  |  |  |  |  | $ 10,000 |  |  |  |  |  |

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