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Preferred and Preference Stock of Utility (Schedule of Preferred and Preference Stock) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Preferred and Preference Stock of Utility |  |
Edison International's preferred and preference stock of utility | $ 1,759 | $ 1,029
Southern California Edison |  |
Preferred and Preference Stock of Utility |  |
Edison International's preferred and preference stock of utility | 1,795 | 1,045
Southern California Edison | 4.08% Series |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 650,000 |
Redemption Price (in dollars per share) | $ 25.5 |
Preferred stock before issuance costs | 16 | 16
Preference stock (as a percent) | 4.08% |
Southern California Edison | 4.24% Series |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 1,200,000 |
Redemption Price (in dollars per share) | $ 25.8 |
Preferred stock before issuance costs | 30 | 30
Preference stock (as a percent) | 4.24% |
Southern California Edison | 4.32% Series |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 1,653,429 |
Redemption Price (in dollars per share) | $ 28.75 |
Preferred stock before issuance costs | 41 | 41
Preference stock (as a percent) | 4.32% |
Southern California Edison | 4.78% Series |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 1,296,769 |
Redemption Price (in dollars per share) | $ 25.8 |
Preferred stock before issuance costs | 33 | 33
Preference stock (as a percent) | 4.78% |
Southern California Edison | Preferred and Preference Stock |  |
Preferred and Preference Stock of Utility |  |
Preferred stock before issuance costs | 1,795 | 1,045
Less issuance costs | (36) | (16)
Edison International's preferred and preference stock of utility | 1,759 | 1,029
Southern California Edison | 4.32% Series A (variable and noncumulative) |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 3,250,000 |
Redemption Price (in dollars per share) | $ 100 |
Preferred stock before issuance costs | 325 | 400
Preference stock (as a percent) | 4.32% |
Southern California Edison | 6.125% Series B (noncumulative) |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 2,000,000 |
Redemption Price (in dollars per share) | $ 100 |
Preferred stock before issuance costs | 200 | 200
Preference stock (as a percent) | 6.125% |
Southern California Edison | 6.00% Series C (noncumulative) |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 2,000,000 |
Redemption Price (in dollars per share) | $ 100 |
Preferred stock before issuance costs | 200 | 200
Preference stock (as a percent) | 6.00% |
Southern California Edison | 6.50% Series D (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 1,250,000 |
Redemption Price (in dollars per share) | $ 100 |
Preferred stock before issuance costs | 125 | 125
Preference stock (as a percent) | 6.50% |
Southern California Edison | 6.25% Series E (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 350,000 |
Redemption Price (in dollars per share) | $ 1,000 |
Preferred stock before issuance costs | 350 | 0
Preference stock (as a percent) | 6.25% |
Southern California Edison | 5.625% Series F (cumulative) |  |
Preferred and Preference Stock of Utility |  |
Shares Outstanding (shares) | 190,004 |
Redemption Price (in dollars per share) | $ 2,500 |
Preferred stock before issuance costs | $ 475 | $ 0
Preference stock (as a percent) | 5.625% |

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- Definition The amount of noncontrolling interest in subsidiary represented by preferred securities issued by the subsidiary. + 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 210.5-02.31) -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 27 -Article 5 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 7 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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