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Variable Interest Entities (Details) (Southern California Edison, USD $) | 3 Months Ended | 1 Months Ended |  |  |  |  |  | 3 Months Ended | 1 Months Ended |  |  |  |  |  | 3 Months Ended
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Mar. 31, 2014 SCE Trust I | Mar. 31, 2013 SCE Trust I | May 31, 2012 SCE Trust I Trust Securities | Mar. 31, 2014 SCE Trust I Trust Securities | Dec. 31, 2013 SCE Trust I Trust Securities | Mar. 31, 2014 SCE Trust I Series F Preferred Stock | Dec. 31, 2013 SCE Trust I Series F Preferred Stock | May 31, 2012 SCE Trust I Series F Preferred Stock | Mar. 31, 2014 SCE Trust II | Mar. 31, 2013 SCE Trust II | Jan. 31, 2013 SCE Trust II Trust Securities | Mar. 31, 2014 SCE Trust II Trust Securities | Dec. 31, 2013 SCE Trust II Trust Securities | Mar. 31, 2014 SCE Trust II Series G Preferred Stock | Dec. 31, 2013 SCE Trust II Series G Preferred Stock | Jan. 31, 2013 SCE Trust II Series G Preferred Stock | Mar. 31, 2014 SCE Trust III | Mar. 31, 2014 SCE Trust III Trust Securities | Mar. 31, 2014 SCE Trust III Series H Preferred Stock | Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW | Mar. 31, 2013 Variable Interest Entity, Not Primary Beneficiary SCE Power Purchase Contracts MW
Details of projects or entities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Power generating capacity (in megawatts) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,641 | 3,578
Payments to unconsolidated VIEs for power purchase contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 125,000,000 | $ 98,000,000
Unconsolidated Trust |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Security dividend rate, (as a percent) |  |  | 5.625% |  |  |  |  |  |  |  | 5.10% |  |  |  |  |  |  | 5.75% | 5.75% |  |
Liquidation preference |  |  | 475,000,000 |  |  | 475,000,000 | 475,000,000 |  |  |  | 400,000,000 |  |  | 400,000,000 | 400,000,000 |  |  | 275,000,000 | 275,000,000 |  |
Liquidation value (in dollars per share) |  |  | $ 25 |  |  |  |  | $ 2,500 |  |  | $ 25 |  |  |  |  | $ 2,500 |  | $ 25 | $ 2,500 |  |
Common stock |  |  | 10,000 | 10,000 | 10,000 |  |  |  |  |  | 10,000 | 10,000 | 10,000 |  |  |  |  | 10,000 |  |  |
Dividend income and distributions | $ 7,000,000 | $ 7,000,000 |  |  |  |  |  |  | $ 5,000,000 | $ 4,000,000 |  |  |  |  |  |  | $ 1,000,000 |  |  |  |

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- Definition Payments for electricity purchased during the reporting period under power purchase contracts with unconsolidated VIEs. + References No definition available. + Details
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- Definition Power generating capacity of the project owned and/or controlled by the entity. + References No definition available. + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph d -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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