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Income Taxes (Tax Rate Reconciliation) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Effective Tax Rate |  |  |  |  |  |
Income from continuing operations before income taxes | $ 1,861 |  | $ 1,668 |  | $ 1,479 |
Provision for income tax at federal statutory rate of 35% | 652 |  | 584 |  | 518 |
Repair deductions | (231) | [1] | 0 | [1] | 0 | [1]
Global Settlement related | 0 | [2] | 0 | [2] | (159) | [2]
Change in tax accounting method for asset removal costs | 0 | [3] | 0 | [3] | (40) | [3]
State tax, net of federal benefit | 108 |  | 85 |  | 44 |
Health care legislation | 0 | [4] | 0 | [4] | 39 | [4]
Property-related | (223) | [5] | (46) | [5] | (92) | [5]
Accumulated deferred income tax adjustments | (41) |  | (30) |  | 0 |
Tax reserve | 40 |  | 0 |  | 44 |
Other | (38) |  | (25) |  | (19) |
Total income tax expense from continuing operations | 267 |  | 568 |  | 335 |
Earnings benefit from change in prior year tax deductions | 231 |  |  |  |  |
Total income tax expense from continuing operations | 14.30% |  | 34.10% |  | 22.70% |
Change in tax accounting method for asset removal costs in prior periods |  |  |  |  | 28 |
Southern California Edison |  |  |  |  |  |
Effective Tax Rate |  |  |  |  |  |
Income from continuing operations before income taxes | 1,874 |  | 1,745 |  | 1,532 |
Provision for income tax at federal statutory rate of 35% | 656 |  | 611 |  | 536 |
Repair deductions | (231) | [1] | 0 | [1] | 0 | [1]
Global Settlement related | 0 | [2] | 0 | [2] | (95) | [2]
Change in tax accounting method for asset removal costs | 0 | [3] | 0 | [3] | (40) | [3]
State tax, net of federal benefit | 54 |  | 80 |  | 59 |
Health care legislation | 0 | [4] | 0 | [4] | 39 | [4]
Property-related | (223) | [5] | (46) | [5] | (92) | [5]
Accumulated deferred income tax adjustments | (41) |  | (30) |  | 0 |
Tax reserve | 36 |  | (3) |  | 45 |
Other | (37) |  | (11) |  | (12) |
Total income tax expense from continuing operations | $ 214 |  | $ 601 |  | $ 440 |
Total income tax expense from continuing operations | 11.40% |  | 34.40% |  | 28.70% |
[1] | As discussed below, SCE recorded a $231 million earnings benefit in the fourth quarter of 2012, resulting from the flow-through regulatory treatment for certain repair costs for 2009 – 2011 as adopted in the 2012 GRC.
[2] | During 2010, Edison International and SCE recognized an earnings benefit of $159 million and $95 million, respectively, from the acceptance by the California Franchise Tax Board of the IRS tax positions finalized in 2009 and receipt of the final interest determination from the Franchise Tax Board.
[3] | During the second quarter of 2010, the IRS approved Edison International's request to change its tax accounting method for asset removal costs primarily related to SCE's infrastructure replacement program. As a result, Edison International and SCE recognized a $40 million earnings benefit (of which $28 million relates to asset removal costs incurred prior to 2010) from deducting asset removal costs earlier in the construction cycle. These deductions were recorded on a flow-through basis as required by the CPUC.
[4] | During the first quarter of 2010, Edison International and SCE recorded a $39 million non-cash charge to reverse previously recognized federal tax benefits eliminated by the federal health care legislation enacted in March 2010. The health care law eliminated the federal tax deduction for retiree health care costs to the extent those costs are eligible for federal Medicare Part D subsidies.
[5] | Incremental repair benefit recorded in 2012. See discussion of repair deductions below.

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- Definition A ratio calculated as follows: income tax expense from continuing operations attributable to common shareholders divided by pretax income from continuing operations attributable to common shareholders. + References No definition available. + Details
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- Definition The portion of the difference between total income tax expense (benefit) as reported in the income statement and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, which is attributable to the change in accounting method for asset removal costs. + References No definition available. + Details
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