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GENERAL INFORMATION AND OTHER FINANCIAL DATA - INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] |  |  |  |
Income tax expense (benefit) | $ 175 | $ 80 | $ 551 | $ 414
Income before income taxes and equity earnings | 523 | 364 | 1,852 | 1,029
Equity earnings, before income tax: | 153 | 159 | 285 | 302
Pretax income | $ 676 | $ 523 | $ 2,137 | $ 1,331
Effective income tax rate (as a percent) | 26.00% | 15.00% | 26.00% | 31.00%
San Diego Gas and Electric Company |  |  |  |
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] |  |  |  |
Income tax expense (benefit) | $ 4 | $ 42 | $ 11 | $ 106
Income before income taxes and equity earnings | $ 188 | $ 218 | $ 453 | $ 516
Effective income tax rate (as a percent) | 2.00% | 19.00% | 2.00% | 21.00%
Southern California Gas Company |  |  |  |
Income Tax Expense And Effective Income Tax Rates Disclosure [Line Items] |  |  |  |
Income tax expense (benefit) | $ (21) | $ 19 | $ 73 | $ 103
Income before income taxes and equity earnings | $ 135 | $ 107 | $ 589 | $ 525
Effective income tax rate (as a percent) | (16.00%) | 18.00% | 12.00% | 20.00%

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