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Variable Interest Entities (Table) (Details) - Variable Interest Entity, Not Primary Beneficiary - Southern California Edison - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
SCE Trust I |  |  |
Variable Interest Entity [Line Items] |  |  |
Dividend income | $ 27 | $ 27 | $ 27
Dividend distributions | 27 | 27 | 27
SCE Trust II |  |  |
Variable Interest Entity [Line Items] |  |  |
Dividend income | 20 | 20 | 19
Dividend distributions | 20 | 20 | $ 19
SCE Trust III |  |  |
Variable Interest Entity [Line Items] |  |  |
Dividend income | 16 | 13 |
Dividend distributions | 16 | $ 13 |
SCE Trust IV |  |  |
Variable Interest Entity [Line Items] |  |  |
Dividend income | 6 |  |
Dividend distributions | $ 6 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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