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Income Taxes (Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Income Tax Disclosures [Line Items] |  |
Income from operations before income taxes | $ 129 | $ 196
Provision for income tax at federal statutory rate of 21% | 27 | 41
Decrease in income tax from: |  |
State tax, net of federal benefit | (13) | (7)
Property-related | (78) | (69)
Change related to uncertain tax position | (15) | 0
Deferred tax re-measurement | 0 | (69)
Other | (5) | (8)
Total income tax benefit | $ (84) | $ (112)
Effective tax rate | (65.10%) | (57.10%)
Southern California Edison |  |
Income Tax Disclosures [Line Items] |  |
Income from operations before income taxes | $ 174 | $ 218
Provision for income tax at federal statutory rate of 21% | 37 | 46
Decrease in income tax from: |  |
State tax, net of federal benefit | (12) | (5)
Property-related | (78) | (69)
Change related to uncertain tax position | (17) | 0
Deferred tax re-measurement | 0 | (69)
Other | (5) | (8)
Total income tax benefit | $ (75) | $ (105)
Effective tax rate | (43.10%) | (48.20%)

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- Definition Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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