v3.26.3
REGULATORY MATTERS - REGULATORY ACCOUNTS (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) $ 337   $ 376
Regulatory balancing accounts - net undercollected, Noncurrent 1,046   1,060
SI Partners | Discontinued Operations, Held-for-Sale      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets held for sale 55   54
Pension and PBOP plan obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (544)   (610)
Removal obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (3,738)   (3,540)
Public purpose programs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (295)   (347)
Liability insurance premium      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (48)   (62)
Other balancing accounts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (492)    
Fixed-price contracts and other derivatives      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 32   50
Deferred income taxes recoverable in rates      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 2,688   2,314
Employee benefit costs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 18   18
Environmental costs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 152   152
Sunrise Powerlink fire mitigation      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 124   125
Commodity – electric      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 267   186
Commodity – gas, including transportation      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 583   173
Safety and reliability      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 684   894
2024 GRC retroactive impacts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 0   299
Wildfire mitigation plan      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 871   530
Other balancing accounts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     90
Other regulatory liabilities, net      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 35   104
San Diego Gas and Electric Company      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (622)   (577)
Regulatory balancing accounts - net undercollected, Noncurrent 732   502
Reversal of regulatory disallowances 222 $ 508  
San Diego Gas and Electric Company | General Rate Case      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Increase (decrease) in regulatory disallowances (38)    
San Diego Gas and Electric Company | Fixed-price contracts and other derivatives      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (13)    
San Diego Gas and Electric Company | Pension and PBOP plan obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     (1)
San Diego Gas and Electric Company | Removal obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (3,085)   (2,913)
San Diego Gas and Electric Company | Public purpose programs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (102)   (175)
San Diego Gas and Electric Company | Liability insurance premium      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (63)   (53)
San Diego Gas and Electric Company | Other balancing accounts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (341)    
San Diego Gas and Electric Company | Fixed-price contracts and other derivatives      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     7
San Diego Gas and Electric Company | Deferred income taxes recoverable in rates      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 1,219   1,098
San Diego Gas and Electric Company | Pension and PBOP plan obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 14    
San Diego Gas and Electric Company | Employee benefit costs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 3   3
San Diego Gas and Electric Company | Environmental costs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 112   113
San Diego Gas and Electric Company | Sunrise Powerlink fire mitigation      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 124   125
San Diego Gas and Electric Company | Commodity – electric      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 267   186
San Diego Gas and Electric Company | Commodity – gas, including transportation      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 54   17
San Diego Gas and Electric Company | Safety and reliability      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 268   286
San Diego Gas and Electric Company | 2024 GRC retroactive impacts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 0   124
San Diego Gas and Electric Company | Wildfire mitigation plan      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 871   530
San Diego Gas and Electric Company | Other balancing accounts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     4
San Diego Gas and Electric Company | Other regulatory liabilities, net      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 50   72
Southern California Gas Company      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 924   926
Regulatory balancing accounts - net undercollected, Noncurrent 314   558
Southern California Gas Company | General Rate Case      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Increase (decrease) in regulatory disallowances (111)    
Southern California Gas Company | Transmission Integrity Management Program      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Increase (decrease) in regulatory disallowances (92)    
Southern California Gas Company | Pension and PBOP plan obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (558)   (609)
Southern California Gas Company | Removal obligations      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (653)   (627)
Southern California Gas Company | Public purpose programs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (193)   (172)
Southern California Gas Company | Liability insurance premium      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     (9)
Southern California Gas Company | Other balancing accounts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (151)    
Southern California Gas Company | Other regulatory liabilities, net      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) (15)    
Southern California Gas Company | Fixed-price contracts and other derivatives      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 45   43
Southern California Gas Company | Deferred income taxes recoverable in rates      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 1,434   1,189
Southern California Gas Company | Employee benefit costs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 15   15
Southern California Gas Company | Environmental costs      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 40   39
Southern California Gas Company | Sunrise Powerlink fire mitigation      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 0   0
Southern California Gas Company | Commodity – electric      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 0   0
Southern California Gas Company | Commodity – gas, including transportation      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 529   156
Southern California Gas Company | Safety and reliability      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 416   608
Southern California Gas Company | 2024 GRC retroactive impacts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 0   175
Southern California Gas Company | Wildfire mitigation plan      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) 0   0
Southern California Gas Company | Liability insurance premium      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities) $ 15    
Southern California Gas Company | Other balancing accounts      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     86
Southern California Gas Company | Other regulatory liabilities, net      
Schedule Of Net Regulatory Assets (Liabilities) [Line Items]      
Net regulatory assets (liabilities)     $ 32