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Income Taxes (Textual) (Details) (Southern California Edison, USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014
Income Tax Disclosure [Line Items] |
Reduction to revenue from repair deductions, before tax | $ 231
Tax Years 2003 to 2006 | Proposed Adjustment to Taxable Gain | IRS Examination |
Income Tax Disclosure [Line Items] |
Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment | 208
Tax Years 2003 to 2006 | Disallowance of Repair Allowance Deduction | IRS Examination |
Income Tax Disclosure [Line Items] |
Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment | 101
Tax Years 2007 to 2009 | Disallowance of Repair Allowance Deduction | IRS Examination |
Income Tax Disclosure [Line Items] |
Estimated potential future federal tax payment as of the balance sheet date, including interest and penalties, based on a proposed adjustment | $ 75

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- Definition Estimated amount of loss resulting from an adverse tax position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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