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FAIR VALUE MEASUREMENTS - RECON OF LEVEL 3 ASSETS (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2025 USD ($) $ / MWh | Dec. 31, 2024 USD ($) $ / MWh | Dec. 31, 2023 USD ($) $ / MWh | Dec. 31, 2022 USD ($) $ / MWh
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
FairValueRecurringBasisUnobservableInputReconciliationNetDerivativeAssetLiabilityGainLossStatementOfIncomeExtensibleListNotDisclosedFlag |  | Realized and unrealized gains (losses), net |  |
Other Sempra |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | $ 25 | $ 23 | $ 17 | $ 7
Realized and unrealized gains |  | 11 | 15 | 19
Settlements |  | (9) | (9) | (9)
Ending balance |  | 25 | 23 | 17
Change in unrealized gains relating to instruments still held at December 31 |  | 8 | 13 | 18
Level 3 | SDG&E |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Balance at beginning of period | $ 4 | 10 | 35 | 54
Realized and unrealized gains (losses), net |  | (10) | (17) | (56)
Allocated transmission instruments |  | 3 | (1) | (4)
Settlements |  | 1 | (7) | 41
Balance at end of period |  | 4 | 10 | 35
Change in unrealized gains (losses) relating to derivative instruments still held at the end of the period |  | $ (4) | $ (13) | $ (10)
Level 3 | SDG&E | Minimum |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Congestion revenue rights (in dollars per MWH) | $ / MWh |  | (3.69) | (3.09) |
Market electricity forward price inputs (in dollars per MWH) | $ / MWh |  |  |  | 33.45
Level 3 | SDG&E | Minimum | Forecast |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Congestion revenue rights (in dollars per MWH) | $ / MWh | (7.38) |  |  |
Level 3 | SDG&E | Maximum |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Congestion revenue rights (in dollars per MWH) | $ / MWh |  | 9.55 | 10.71 |
Market electricity forward price inputs (in dollars per MWH) | $ / MWh |  |  |  | 274.70
Level 3 | SDG&E | Maximum | Forecast |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Congestion revenue rights (in dollars per MWH) | $ / MWh | 15.54 |  |  |
Level 3 | SDG&E | Median |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Congestion revenue rights (in dollars per MWH) | $ / MWh |  | (0.44) | (0.56) |
Level 3 | SDG&E | Median | Forecast |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Congestion revenue rights (in dollars per MWH) | $ / MWh | 0.01 |  |  |
Level 3 | SDG&E | Weighted Average |  |  |  |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] |  |  |  |
Market electricity forward price inputs (in dollars per MWH) | $ / MWh |  |  |  | 85.64
Level 3 | Other Sempra | Other Current Assets |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | $ 7 | $ 7 |  |
Ending balance |  | 7 | $ 7 |
Level 3 | Other Sempra | Other long-term assets |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | $ 18 | 16 |  |
Ending balance |  | $ 18 | $ 16 |

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