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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, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Related Party Transaction [Line Items] |  |  |  |
Revenues | $ 3,335 | $ 3,547 | $ 9,895 | $ 7,367
Interest income | 17 | 15 | 41 | 40
Interest expense | 317 | 271 | 683 | 514
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Revenues | 11 | 15 | 24 | 22
Interest income | 0 | 4 | 0 | 14
Interest expense | 4 | 4 | 8 | 8
San Diego Gas and Electric Company |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest income | 4 | 1 | 5 | 1
Interest expense | 123 | 114 | 241 | 220
Operating revenues | 1,262 | 1,399 | 2,915 | 2,844
San Diego Gas and Electric Company | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Operating revenues | 6 | 4 | 10 | 8
Cost of sales | 27 | 26 | 57 | 50
Southern California Gas Company |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest income | 1 | 1 | 5 | 1
Interest expense | 71 | 45 | 140 | 85
Operating revenues | 1,467 | 1,501 | 5,261 | 3,494
Southern California Gas Company | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Operating revenues | 28 | 23 | 62 | 49
Cost of sales | $ 4 | $ (4) | $ 35 | $ (4)

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