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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - TRANSACTIONS WITH AFFILIATES (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | $ 13 | $ 31
Due to unconsolidated affiliates, noncurrent | (352) | (307)
Related Party |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 13 | 31
Total due to unconsolidated affiliates – current | 0 | (5)
Due to unconsolidated affiliates, noncurrent | (352) | (307)
Other related parties |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 5 | 6
Tax Sharing Arrangement | Related Party |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 8 | 25
SDG&E | Related Party |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | (59) | (73)
SDG&E | Other related parties |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | (3) | (8)
SDG&E | Due to/from Sempra Energy |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | (42) | (44)
SDG&E | Due to/from SoCalGas |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | (14) | (21)
SoCalGas |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 16 | 22
SoCalGas | Related Party |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 16 | 22
Total due to unconsolidated affiliates – current | (38) | (38)
SoCalGas | Other related parties |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 2 | 1
SoCalGas | Due to/from Sempra Energy |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | (38) | (38)
Income taxes due from (to) Sempra | (6) | 6
SoCalGas | Due to/from SDGE |  |
Related Party Transaction [Line Items] |  |
Due from unconsolidated affiliates | 14 | 21
SDG&E and SoCalGas | Related Party |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | (59) | (73)
SDG&E and SoCalGas | Due to/from Sempra Energy |  |
Related Party Transaction [Line Items] |  |
Income taxes due from (to) Sempra | 38 | 246
Five Point Five Percent Note Due January 2024 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Total due to unconsolidated affiliates – current | $ 0 | (5)
Stated rate of debt (as a percent) | 5.50% |
Five Point Five Percent Note Due January 2025 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ 0 | (24)
Five Point Five Percent Note due July 2025 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ 0 | (23)
Five Point Five Percent Note due January 2026 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ (8) | (20)
Five Point Five Percent Note due July 2026 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ (12) | (11)
Five Point Five Percent Note due January 2027 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ (15) | (14)
Five Point Five Percent Note due July 2027 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ (19) | (17)
Five Point Five Percent Note Due January 2028 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ (48) | 0
Five Point Five Percent Note Due July 2028 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.50% |
Due to unconsolidated affiliates, noncurrent | $ (41) | 0
Five Point Seven Four Percent Note December 2029 | TAG Pipelines Norte | Related Party |  |
Related Party Transaction [Line Items] |  |
Due to unconsolidated affiliates, noncurrent | $ (209) | $ (198)
Five Point Seven Four Percent Note December 2029 | TAG JV Notes | Related Party |  |
Related Party Transaction [Line Items] |  |
Stated rate of debt (as a percent) | 5.74% |

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