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Income Taxes (Components of Net Accumulated Deferred Income Tax Liability) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Deferred tax assets: |  |
Property and software related | $ 523 | $ 600
Unrealized gains and losses | 579 | 491
Loss and credit carryforwards | 2,228 | 1,515
Regulatory balancing accounts | 139 | 80
Pension and PBOPs | 264 | 275
Other | 721 | 723
Sub-total | 4,454 | 3,684
Less valuation allowance | 1,380 | 1,017
Total | 3,074 | 2,667
Deferred tax liabilities: |  |
Property-related | 7,879 | 7,289
Capitalized software costs | 318 | 325
Regulatory balancing accounts | 625 | 296
Unrealized gains and losses | 569 | 477
Other | 503 | 471
Total | 9,894 | 8,858
Accumulated deferred income tax liability, net | 6,820 | 6,191
Included in deferred credits and other liabilities | 7,241 | 6,127
Included in current liabilities (assets) | (421) | 64
Southern California Edison |  |
Deferred tax assets: |  |
Property and software related | 523 | 600
Unrealized gains and losses | 569 | 477
Loss and credit carryforwards | 427 | 125
Regulatory balancing accounts | 139 | 80
Pension and PBOPs | 86 | 99
Other | 563 | 625
Sub-total | 2,307 | 2,006
Less valuation allowance | 0 | 0
Total | 2,307 | 2,006
Deferred tax liabilities: |  |
Property-related | 7,869 | 7,279
Capitalized software costs | 318 | 325
Regulatory balancing accounts | 625 | 296
Unrealized gains and losses | 569 | 477
Other | 399 | 379
Total | 9,780 | 8,756
Accumulated deferred income tax liability, net | 7,473 | 6,750
Included in deferred credits and other liabilities | 7,737 | 6,669
Included in current liabilities (assets) | $ (264) | $ 81

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