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Investments (Nuclear Decommissioning Trusts) (Details) - Southern California Edison - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Other Investments [Line Items] |  |
Unrealized holding gains, net of losses | $ 1,500 | $ 1,500
Deferred income taxes related to unrealized gains | 373 |
Nuclear decommissioning trusts | $ 4,000 |

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- Definition Decommissioning Fund Investments, Fair Value, Net of Deferred Income Tax + References No definition available. + Details
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- Definition Decommissioning Trust, Deferred Income Taxes + References No definition available. + Details
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- Definition Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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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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