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COMMITMENTS AND CONTINGENCIES - ENVIRONMENTAL ISSUES (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) site | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Environmental Issues [Line Items] |  |  |
Potential monetary sanctions threshold, percentage | 1.00% |  |
Potential monetary sanctions threshold, actual amount | $ 53 |  |
Capital expenditures for environmental issues | 65 | $ 107 | $ 87
Accrued liability for environmental matters, discount | $ 14 |  |
Accrued liability for environmental matters, discount rate (as a percent) | 2.45% |  |
Accrual for environmental loss contingencies | $ 54 |  |
Accrual for environmental loss contingencies, current | 6 |  |
Accrual for environmental loss contingencies, noncurrent | $ 48 |  |
Environmental Loss Contingency, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Liabilities, Other than Long-Term Debt, Noncurrent |  |
Expected future payments for accruals, year one | $ 6 |  |
Expected future payments for accruals, year two | 4 |  |
Expected future payments for accruals, year three | 8 |  |
Expected future payments for accruals, year four | 24 |  |
Expected future payments for accruals, year five | 1 |  |
Expected future payments for accruals, thereafter | 14 |  |
Minimum |  |  |
Environmental Issues [Line Items] |  |  |
Potential monetary sanctions threshold | 1 |  |
SDG&E |  |  |
Environmental Issues [Line Items] |  |  |
Potential monetary sanctions threshold, actual amount | 13 |  |
Capital expenditures for environmental issues | 23 | 29 | 31
Accrual for environmental loss contingencies | 16 |  |
Accrual for environmental loss contingencies, noncurrent | 15 |  |
SoCalGas |  |  |
Environmental Issues [Line Items] |  |  |
Potential monetary sanctions threshold, actual amount | 16 |  |
Capital expenditures for environmental issues | 42 | $ 78 | $ 56
Accrued liability for environmental matters, discount | $ 14 |  |
Accrued liability for environmental matters, discount rate (as a percent) | 2.45% |  |
Accrual for environmental loss contingencies | $ 38 |  |
Accrual for environmental loss contingencies, current | 5 |  |
Accrual for environmental loss contingencies, noncurrent | 33 |  |
SDG&E and SoCalGas |  |  |
Environmental Issues [Line Items] |  |  |
Accrual for environmental loss contingencies, current | 1 |  |
Manufactured-gas sites |  |  |
Environmental Issues [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 34 |  |
Manufactured-gas sites | SDG&E |  |  |
Environmental Issues [Line Items] |  |  |
Number of sites complete | site | 3 |  |
Number of sites in process | site | 0 |  |
Accrual for environmental loss contingencies | $ 0 |  |
Manufactured-gas sites | SoCalGas |  |  |
Environmental Issues [Line Items] |  |  |
Number of sites complete | site | 39 |  |
Number of sites in process | site | 3 |  |
Accrual for environmental loss contingencies | $ 34 |  |
Waste Disposal Sites |  |  |
Environmental Issues [Line Items] |  |  |
Accrual for environmental loss contingencies | $ 8 |  |
Waste Disposal Sites | SDG&E |  |  |
Environmental Issues [Line Items] |  |  |
Number of sites complete | site | 2 |  |
Number of sites in process | site | 1 |  |
Accrual for environmental loss contingencies | $ 5 |  |
Waste Disposal Sites | SoCalGas |  |  |
Environmental Issues [Line Items] |  |  |
Number of sites complete | site | 5 |  |
Number of sites in process | site | 2 |  |
Accrual for environmental loss contingencies | $ 3 |  |
Other hazardous waste sites |  |  |
Environmental Issues [Line Items] |  |  |
Accrual for environmental loss contingencies | 12 |  |
Other hazardous waste sites | SDG&E |  |  |
Environmental Issues [Line Items] |  |  |
Accrual for environmental loss contingencies | 11 |  |
Other hazardous waste sites | SoCalGas |  |  |
Environmental Issues [Line Items] |  |  |
Accrual for environmental loss contingencies | 1 |  |
SONGS Sites | SDG&E |  |  |
Environmental Issues [Line Items] |  |  |
Estimated SONGS mitigation costs, recoverable in rates | 154 |  |
SONGS mitigation costs incurred | 56 |  |
SONGS mitigation costs remaining | $ 98 |  |

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