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Commitments and Contingencies (Contingencies) (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Regulatory Assets [Line Items] |  |
Regulatory assets | $ 7,674 | $ 7,455
Southern California Edison |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 7,674 | 7,455
Southern California Edison | San Onofre |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | $ 815 | $ 857

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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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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- Details
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- Details
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