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Other Investments (Amortized Cost and Fair Value of Nuclear Decommissioning Trusts) (Details) (Southern California Edison, USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Nuclear Decommissioning Trusts Disclosures |  |
Total Investments, Amortized Cost | $ 2,800 | $ 2,770
Total Investments, Fair Value | 4,587 | 4,494
Stocks |  |
Nuclear Decommissioning Trusts Disclosures |  |
Longest Maturity Dates (in years) | 0 |
Total Investments, Amortized Cost | 668 | 656
Total Investments, Fair Value | 2,234 | 2,208
Municipal bonds |  |
Nuclear Decommissioning Trusts Disclosures |  |
Longest Maturity Dates (in years) | 2051 |
Total Investments, Amortized Cost | 725 | 675
Total Investments, Fair Value | 838 | 756
U.S. government and agency securities |  |
Nuclear Decommissioning Trusts Disclosures |  |
Longest Maturity Dates (in years) | 2044 |
Total Investments, Amortized Cost | 812 | 902
Total Investments, Fair Value | 864 | 947
Corporate bonds |  |
Nuclear Decommissioning Trusts Disclosures |  |
Longest Maturity Dates (in years) | 2054 |
Total Investments, Amortized Cost | 253 | 208
Total Investments, Fair Value | 296 | 241
Short-term investments and receivables/payables |  |
Nuclear Decommissioning Trusts Disclosures |  |
Longest Maturity Dates (in years) | One-year |
Total Investments, Amortized Cost | 342 | 329
Total Investments, Fair Value | $ 355 | $ 342

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- Definition Decommissioning Trust Investments + References No definition available. + Details
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- Definition Decommissioning Trust Investments Amortized Cost + References No definition available. + Details
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- Definition The maturity dates for decommissioning trust investments. + References No definition available. + Details
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- Details
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