v3.25.2
FAIR VALUE MEASUREMENTS - RECON OF LEVEL 3 ASSETS (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
$ / MWh
Jun. 30, 2024
USD ($)
$ / MWh
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance $ 4 $ 9 $ 4 $ 10
Realized and unrealized gains (losses), net (1) (2) (2) (3)
Allocated transmission instruments 1 0 3 0
Settlements (1) (1) (2) (1)
Ending balance 3 6 3 6
Change in unrealized losses relating to instruments still held at June 30 (1) (1) (3) (2)
Other Sempra        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance 38 23 25 23
Realized and unrealized gains (losses), net 3 2 18 4
Settlements (2) (2) (4) (4)
Ending balance 39 23 39 23
Change in unrealized gains relating to instruments still held at June 30 3 2 18 3
Other Sempra | Other current assets        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Ending balance 8   8  
Other Sempra | Other long-term assets        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Ending balance 31   31  
SDG&E        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance 4 9 4 10
Realized and unrealized gains (losses), net (1) (2) (2) (3)
Allocated transmission instruments 1 0 3 0
Settlements (1) (1) (2) (1)
Ending balance 3 6 3 6
Change in unrealized losses relating to instruments still held at June 30 $ (1) $ (1) $ (3) $ (2)
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     (7.38) (3.69)
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     15.54 9.55
Level 3 | SDG&E | Weighted Average        
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 (0.44)