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Preferred and Preference Stock of Utility (Schedule of Preferred and Preference Stock) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Preferred and Preference Stock of Utility |  |
Preferred and preference stock of utility | $ 2,020 | $ 2,022
Southern California Edison |  |
Preferred and Preference Stock of Utility |  |
Preferred and preference stock of utility | $ 2,070 | 2,070
Southern California Edison | 4.08% Series |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 4.08% |
Shares Outstanding | 650,000 |
Redemption Price (in dollars per share) | $ 25.5 |
Preferred stock before issuance costs | $ 16 | 16
Southern California Edison | 4.24% Series |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 4.24% |
Shares Outstanding | 1,200,000 |
Redemption Price (in dollars per share) | $ 25.8 |
Preferred stock before issuance costs | $ 30 | 30
Southern California Edison | 4.32% Series |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 4.32% |
Shares Outstanding | 1,653,429 |
Redemption Price (in dollars per share) | $ 28.75 |
Preferred stock before issuance costs | $ 41 | 41
Southern California Edison | 4.78% Series |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 4.78% |
Shares Outstanding | 1,296,769 |
Redemption Price (in dollars per share) | $ 25.8 |
Preferred stock before issuance costs | $ 33 | 33
Southern California Edison | Preference stock |  |
Preferred and Preference Stock of Utility |  |
Preferred stock before issuance costs | 2,070 | 2,070
Less issuance costs | (50) | (48)
Preferred and preference stock of utility | $ 2,020 | 2,022
Southern California Edison | 4.51% Series A (variable and noncumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 4.51% |
Shares Outstanding | 3,250,000 |
Redemption Price (in dollars per share) | $ 100 |
Preferred stock before issuance costs | $ 0 | 325
Southern California Edison | 6.50% Series D (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 6.50% |
Shares Outstanding | 1,250,000 |
Redemption Price (in dollars per share) | $ 100 |
Preferred stock before issuance costs | $ 125 | 125
Southern California Edison | 6.25% Series E (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 6.25% |
Shares Outstanding | 350,000 |
Redemption Price (in dollars per share) | $ 1,000 |
Preferred stock before issuance costs | $ 350 | 350
Southern California Edison | 5.625% Series F (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 5.625% |
Shares Outstanding | 190,004 |
Redemption Price (in dollars per share) | $ 2,500 |
Preferred stock before issuance costs | $ 475 | 475
Southern California Edison | 5.10% Series G (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 5.10% |
Shares Outstanding | 160,004 |
Redemption Price (in dollars per share) | $ 2,500.00 |
Preferred stock before issuance costs | $ 400 | 400
Southern California Edison | 5.75% Series H (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 5.75% |
Shares Outstanding | 110,004 |
Redemption Price (in dollars per share) | $ 2,500.00 |
Preferred stock before issuance costs | $ 275 | 275
Southern California Edison | 5.375% Series J (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 5.375% |
Shares Outstanding | 130,004 |
Redemption Price (in dollars per share) | $ 2,500,000,000.00 |
Preferred stock before issuance costs | $ 325 | $ 0
Variable Interest Entity, Not Primary Beneficiary | Southern California Edison Trust III | Southern California Edison | 5.75% Series H (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Preferred Stock, dividend rate, (as a percent) | 5.75% | 5.75%

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