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Income Taxes (Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Income Tax Disclosures [Line Items] |  |
Income from continuing operations before income taxes | $ 352 | $ 333
Provision for income tax at federal statutory rate of 35% | 124 | 117
Increase in income tax from: |  |
State tax, net of federal benefit | 10 | 6
Property-related | (113) | (79)
Change related to uncertain tax positions | (12) | (1)
Shared-based compensation | (43) | (10)
Other | (6) | (5)
Total income tax (benefit) expense from continuing operations | $ (40) | $ 28
Effective tax rate | (11.40%) | 8.40%
Federal statutory rate | 35.00% | 35.00%
Southern California Edison |  |
Income Tax Disclosures [Line Items] |  |
Income from continuing operations before income taxes | $ 392 | $ 367
Provision for income tax at federal statutory rate of 35% | 137 | 128
Increase in income tax from: |  |
State tax, net of federal benefit | 13 | 9
Property-related | (113) | (79)
Change related to uncertain tax positions | (11) | (1)
Shared-based compensation | (8) | (8)
Other | (6) | (7)
Total income tax (benefit) expense from continuing operations | $ 12 | $ 42
Effective tax rate | 3.10% | 11.40%
Federal statutory rate | 35.00% | 35.00%
Tax benefits from abandonment loss | $ 39 |
State |  |
Increase in income tax from: |  |
Shared-based compensation | 6 | $ 3
State | Southern California Edison |  |
Increase in income tax from: |  |
Shared-based compensation | 1 | $ 2
Tax benefits from abandonment loss | 1,140 |
Federal | Southern California Edison |  |
Increase in income tax from: |  |
Tax benefits from abandonment loss | $ 698 |

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