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Variable Interest Entities (Details) - Southern California Edison | 12 Months Ended
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Dec. 31, 2015 USD ($) $ / shares MW | Dec. 31, 2014 USD ($) $ / shares MW
Series G Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.10% |
Series H Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.75% |
Series J Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.375% |
Liquidation preference | $ 325,000,000 |
Series F Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.625% |
Variable Interest Entity, Not Primary Beneficiary | SCE Power Purchase Contracts |  |
Details of projects or entities |  |
Power generating capacity for majority interest (in megawatts) | MW | 4,062 | 5,641
Payments to unconsolidated VIEs for power purchase contracts | $ 640,000,000 | $ 739,000,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust I |  |
Unconsolidated Trust |  |
Common stock | $ 10,000 | $ 10,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust I | Trust Securities |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.625% | 5.625%
Liquidation preference | $ 475,000,000 | $ 475,000,000
Liquidation value (in dollars per share) | $ / shares | $ 25 | $ 25
Variable Interest Entity, Not Primary Beneficiary | SCE Trust I | Series F Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.625% | 5.625%
Liquidation preference | $ 475,000,000 | $ 475,000,000
Liquidation value (in dollars per share) | $ / shares | $ 2,500 | $ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust II |  |
Unconsolidated Trust |  |
Common stock | $ 10,000 | $ 10,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust II | Trust Securities |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.10% | 5.10%
Liquidation preference | $ 400,000,000 | $ 400,000,000
Liquidation value (in dollars per share) | $ / shares | $ 25 | $ 25
Variable Interest Entity, Not Primary Beneficiary | SCE Trust II | Series G Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.10% | 5.10%
Liquidation preference | $ 400,000,000 | $ 400,000,000
Liquidation value (in dollars per share) | $ / shares | $ 2,500 | $ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust III |  |
Unconsolidated Trust |  |
Common stock | $ 10,000 | $ 10,000
Variable Interest Entity, Not Primary Beneficiary | SCE Trust III | Trust Securities |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.75% | 5.75%
Liquidation preference | $ 275,000,000 | $ 275,000,000
Liquidation value (in dollars per share) | $ / shares | $ 25 | $ 25
Variable Interest Entity, Not Primary Beneficiary | SCE Trust III | Series H Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.75% | 5.75%
Liquidation preference | $ 275,000,000 | $ 275,000,000
Liquidation value (in dollars per share) | $ / shares | $ 2,500 | $ 2,500
Variable Interest Entity, Not Primary Beneficiary | SCE Trust IV |  |
Unconsolidated Trust |  |
Common stock | $ 10,000 |
Variable Interest Entity, Not Primary Beneficiary | SCE Trust IV | Trust Securities |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.375% |
Liquidation preference | $ 325,000,000 |
Liquidation value (in dollars per share) | $ / shares | $ 25 |
Variable Interest Entity, Not Primary Beneficiary | SCE Trust IV | Series J Preferred Stock |  |
Unconsolidated Trust |  |
Security dividend rate, (as a percent) | 5.375% |
Liquidation preference | $ 325,000,000 |
Liquidation value (in dollars per share) | $ / shares | $ 2,500 |

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