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GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Related Party Transaction [Line Items] |  |  |  |
Revenues | $ 3,151 | $ 2,776 | $ 9,953 | $ 9,427
Interest expense | 403 | 328 | 1,195 | 944
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 9 | 11 | 26 | 31
Interest expense | 4 | 5 | 13 | 12
SDG&E |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 1,480 | 1,243 | 4,162 | 3,977
Interest expense | 141 | 131 | 415 | 390
Operating revenues | 1,480 | 1,243 | 4,162 | 3,977
SDG&E | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Operating revenues | 6 | 6 | 17 | 17
Cost of sales | 35 | 36 | 103 | 111
SoCalGas |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 1,181 | 1,054 | 4,469 | 4,168
Interest expense | 93 | 82 | 272 | 237
Operating revenues | 1,181 | 1,054 | 4,469 | 4,168
SoCalGas | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Operating revenues | 47 | 43 | 128 | 124
Cost of sales | $ (2) | $ (2) | $ (3) | $ (5)

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