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Income Taxes (Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Income Tax Disclosure [Line Items] |  |  |  |
Income from continuing operations before income taxes | $ 259 | $ 412 | $ 591 | $ 837
Provision for income tax at federal statutory rate of 35% | 91 | 144 | 207 | 293
Increase in income tax from: |  |  |  |
State tax, net of federal benefit | 4 | 5 | 11 | 16
Property-related | (138) | (69) | (217) | (129)
Change related to uncertain tax positions | 2 | (77) | 1 | (62)
Other | (6) | 3 | (11) | (5)
Total income tax (benefit) expense from continuing operations | $ (47) | $ 6 | $ (9) | $ 113
Effective tax rate | (18.10%) | 1.50% | (1.50%) | 13.50%
Federal statutory rate | 35.00% | 35.00% | 35.00% | 35.00%
Southern California Edison |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Income from continuing operations before income taxes | $ 317 | $ 419 | $ 683 | $ 860
Provision for income tax at federal statutory rate of 35% | 111 | 147 | 239 | 301
Increase in income tax from: |  |  |  |
State tax, net of federal benefit | 6 | 2 | 15 | 16
Property-related | (138) | (69) | (217) | (129)
Change related to uncertain tax positions | (1) | (75) | (2) | (65)
Other | (7) | 2 | (14) | (8)
Total income tax (benefit) expense from continuing operations | $ (29) | $ 7 | $ 21 | $ 115
Effective tax rate | (9.10%) | 1.70% | 3.10% | 13.40%
Federal statutory rate | 35.00% | 35.00% | 35.00% | 35.00%
Tax Years 2012 to 2014 | Internal Revenue Service (IRS) | Southern California Edison |  |  |  |
Increase in income tax from: |  |  |  |
Tax liability | $ 79 |  |  |
Tax adjustments, pre tax | $ 133 |  |  |

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