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Investments (Textual) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Other Investments [Line Items] |  |  |  |  |  |
Proceeds from sale of securities |  |  |  | $ 12,915 | $ 5,846 |
Southern California Edison |  |  |  |  |  |
Other Investments [Line Items] |  |  |  |  |  |
Proceeds from sale of securities |  | $ 5,700 | $ 2,100 | 12,915 | $ 5,846 |
Unrealized holding gains, net of losses |  | 1,400 |  | 1,400 |  | $ 1,800
Deferred income taxes related to unrealized gains |  | 344 |  | 344 |  |
Nuclear decommissioning trusts |  | $ 4,000 |  | $ 4,000 |  |
Reimbursed expenses | $ 319 |  |  |  |  |

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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 Decommissioning Trust Fund, Reimbursed Expenses + 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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- Definition The cash inflow from the sale of assets held in a decommissioning trust fund. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Details
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