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GENERAL INFORMATION AND OTHER FINANCIAL DATA - AFFILIATES REVENUE AND COST OF SALES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Related Party Transaction [Line Items] |  |  |  |
Revenues | $ 3,000 | $ 3,011 | $ 6,802 | $ 6,651
Interest expense | 359 | 311 | 792 | 616
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 8 | 10 | 17 | 20
Interest expense | 5 | 3 | 9 | 7
SDG&E |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 1,262 | 1,355 | 2,682 | 2,734
Interest expense | 139 | 131 | 274 | 259
Operating revenues | 1,262 | 1,355 | 2,682 | 2,734
SDG&E | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Operating revenues | 5 | 5 | 11 | 11
Cost of sales | 30 | 35 | 68 | 75
SoCalGas |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 1,268 | 1,309 | 3,288 | 3,114
Interest expense | 89 | 78 | 179 | 155
Operating revenues | 1,268 | 1,309 | 3,288 | 3,114
SoCalGas | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Operating revenues | 40 | 37 | 81 | 81
Cost of sales | $ 0 | $ 0 | $ (1) | $ (3)

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