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COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details) £ in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 4 Months Ended | 9 Months Ended | 12 Months Ended | 48 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 01, 2024 plaintiff claim lawsuit | Sep. 30, 2021 USD ($) plaintiff lawsuit | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Feb. 11, 2016 well | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 GBP (£) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 claimant lawsuit | Jul. 31, 2024 lawsuit | Aug. 31, 2023 Bcf | Dec. 31, 2015 company
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for legal proceedings |  |  | $ 53 |  |  | $ 53 |  |  |  |  |  |  |  |
Number of liquidating companies | company |  |  |  |  |  |  |  |  |  |  |  |  |  | 10
Equity earnings |  |  | 454 | $ 479 |  | 1,235 | $ 1,086 |  |  |  |  |  |  |
Sempra Infrastructure |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | lawsuit |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Number of claimants | claimant |  |  |  |  |  |  |  |  |  |  | 3 |  |  |
Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | lawsuit |  | 390 |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | plaintiff |  | 36,000 |  |  |  |  |  |  |  |  |  |  |  |
HMRC VAT Claim |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Damages awarded |  |  |  |  |  |  |  | $ 10 | £ 7.9 |  |  |  |  |
Individual Plaintiff Litigation | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of costs |  | $ 1,800 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of plaintiffs agreeing to participate and submit releases (in percent) |  |  |  |  |  |  |  |  |  | 99.00% |  |  |  |
Non-Settling Individual Plaintiffs | Aliso Canyon Natural Gas Storage Facility Gas Leak | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | plaintiff | 520 |  |  |  |  |  |  |  |  |  |  |  |  |
RBS Sempra Commodities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity earnings |  |  |  |  |  |  |  | $ 40 |  |  |  |  |  |
SoCalGas |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for legal proceedings |  |  | 28 |  |  | 28 |  |  |  |  |  |  |  |
Wells with gas leak | well |  |  |  |  | 1 |  |  |  |  |  |  |  |  |
Natural gas inventory level (in bcf) | Bcf |  |  |  |  |  |  |  |  |  |  |  |  | 68.6 |
SoCalGas | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | lawsuit |  | 390 |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | plaintiff |  | 36,000 |  |  |  |  |  |  |  |  |  |  |  |
Net book value of Aliso Canyon facility |  |  | 1,000 |  |  | 1,000 |  |  |  |  |  |  |  |
SoCalGas | Individual Plaintiff Litigation | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of costs |  | $ 1,800 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of plaintiffs agreeing to participate and submit releases (in percent) |  |  |  |  |  |  |  |  |  | 99.00% |  |  |  |
Payment of liquidating companies' costs |  |  |  |  |  |  |  |  |  | $ 1,790 |  |  |  |
SoCalGas | Non-Settling Individual Plaintiffs | Aliso Canyon Natural Gas Storage Facility Gas Leak | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | plaintiff | 520 |  |  |  |  |  |  |  |  |  |  |  |  |
SDG&E |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of lawsuits | lawsuit |  |  |  |  |  |  |  |  |  |  | 2 |  |  |
Energy Future Holdings Corp. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lawsuits pending | lawsuit | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of proof of claims | claim | 28,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Credits and Other | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable related to natural gas leak |  |  | 1 |  |  | 1 |  |  |  |  |  |  |  |
Deferred Credits and Other | SoCalGas | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable related to natural gas leak |  |  | 1 |  |  | 1 |  |  |  |  |  |  |  |
Other current liabilities | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable related to natural gas leak |  |  | 21 |  |  | 21 |  |  |  |  |  |  |  |
Other current liabilities | SoCalGas | Aliso Canyon Natural Gas Storage Facility Gas Leak |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable related to natural gas leak |  |  | $ 21 |  |  | $ 21 |  |  |  |  |  |  |  |

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