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GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] |  |
Income Tax Expense (Benefit) | $ 42 | $ 242
Income from continuing operations before income taxes and equity earnings (losses) of unconsolidated entities | 501 | 593
Equity (losses) earnings, before income tax | 5 | 5
Pretax income | $ 506 | $ 598
Effective income tax rate | 8.00% | 40.00%
Income tax expense related to outside basis differences existing prior to the January 25, 2019 approval of our plan to sell our South American businesses | $ 103 |
Income tax expense related to the increase in outside basis differences from 2019 earnings since January 25, 2019 | 13 |
San Diego Gas and Electric Company [Member] |  |
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] |  |
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Assets and Liabilities, Income Tax (Expense) Benefit, Recognized in Period | 31 |
Income Tax Expense (Benefit) | 5 | $ 56
Income from continuing operations before income taxes and equity earnings (losses) of unconsolidated entities | 182 | 225
Pretax income | $ 182 | $ 225
Effective income tax rate | 3.00% | 25.00%
Southern California Gas Company [Member] |  |
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] |  |
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Assets and Liabilities, Income Tax (Expense) Benefit, Recognized in Period | $ 35 |
Income Tax Expense (Benefit) | 19 | $ 59
Income from continuing operations before income taxes and equity earnings (losses) of unconsolidated entities | 283 | 284
Pretax income | $ 283 | $ 284
Effective income tax rate | 7.00% | 21.00%

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