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Income Taxes (Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Line Items] |  |  |  |
Federal statutory income tax rate, percent |  | 35.00% | 35.00% | 35.00%
Effective Tax Rate |  |  |  |
Income from continuing operations before income taxes |  | $ 1,568 | $ 1,979 | $ 1,221
Provision for income tax at federal statutory rate of 35% |  | 549 | 693 | 427
Regulatory asset write-off1 | [1] | 382 | 0 | 0
State tax, net of federal benefit |  | 5 | 56 | 18
Property-related | [2] | (341) | (252) | (216)
Change related to uncertain tax positions |  | (67) | 5 | 14
San Onofre OII settlement |  | 0 | (23) | 24
Other |  | (42) | (36) | (25)
Total income tax expense from continuing operations |  | $ 486 | $ 443 | $ 242
Effective tax rate, percent |  | 31.00% | 22.40% | 19.80%
Southern California Edison |  |  |  |
Effective Tax Rate |  |  |  |
Income from continuing operations before income taxes |  | $ 1,618 | $ 2,039 | $ 1,279
Provision for income tax at federal statutory rate of 35% |  | 566 | 714 | 448
Regulatory asset write-off1 | [1] | 382 | 0 | 0
State tax, net of federal benefit |  | 34 | 55 | 34
Property-related | [2] | (341) | (252) | (216)
Change related to uncertain tax positions |  | (94) | 12 | 14
San Onofre OII settlement |  | 0 | (23) | 24
Other |  | (40) | (32) | (25)
Total income tax expense from continuing operations |  | $ 507 | $ 474 | $ 279
Effective tax rate, percent |  | 31.30% | 23.20% | 21.80%
[1] | Includes federal and state.
[2] | Includes incremental repair benefit recorded in 2013 to 2015. See discussion of repair deductions below.

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