v3.26.3
REGULATORY MATTERS - CPUC GRC Narrative (Details) - USD ($)
$ in Millions
 1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended
Oct. 29, 2026
May 31, 2026
Sep. 30, 2026
Jun. 30, 2026
Jul. 31, 2025
Apr. 30, 2025
May 31, 2026
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
General Rate Case [Line Items]                        
Regulatory disallowances, net               $ (205)   $ 0 $ (205) $ 0
San Diego Gas and Electric Company                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               104 $ (651) 0 104 0
Regulatory disallowances, after tax                 $ 464      
San Diego Gas and Electric Company | Revenue Requirement, Period One                        
General Rate Case [Line Items]                        
Requested revenue amount       $ 3,748                
San Diego Gas and Electric Company | Revenue Recognition, Period Two                        
General Rate Case [Line Items]                        
Requested recovery amount       325                
San Diego Gas and Electric Company | Revenue Recognition, Period Three                        
General Rate Case [Line Items]                        
Requested recovery amount       224                
San Diego Gas and Electric Company | General Rate Case                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               104        
Regulatory disallowances, after tax               72        
San Diego Gas and Electric Company | General Rate Case | Regulatory Disallowances Period, Prior Years                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (98)        
Regulatory disallowances, after tax               67        
San Diego Gas and Electric Company | General Rate Case | Regulatory Disallowances Period, Current Year                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (6)        
Regulatory disallowances, after tax               5        
Southern California Gas Company                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (309)   $ 0 (309) 0
Southern California Gas Company | Revenue Requirement, Period One                        
General Rate Case [Line Items]                        
Requested revenue amount       5,090                
Southern California Gas Company | Revenue Recognition, Period Two                        
General Rate Case [Line Items]                        
Requested recovery amount       314                
Southern California Gas Company | Revenue Recognition, Period Three                        
General Rate Case [Line Items]                        
Requested recovery amount       $ 311                
Southern California Gas Company | Transmission Integrity Management Program                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (92)        
Regulatory disallowances, after tax               66        
Southern California Gas Company | Transmission Integrity Management Program | Subsequent Event                        
General Rate Case [Line Items]                        
Regulatory disallowances, net $ (30)                      
Advice letter period 30 days                      
Southern California Gas Company | Transmission Integrity Management Program | Regulatory Disallowances Period, Prior Years                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (91)        
Regulatory disallowances, after tax               66        
Southern California Gas Company | Transmission Integrity Management Program | Regulatory Disallowances Period, Current Year                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (1)        
Southern California Gas Company | Transmission Integrity Management Program | California Public Utilities Commission                        
General Rate Case [Line Items]                        
Approved recovery amount     $ 82                  
Requested recovery amount     174                  
Southern California Gas Company | Catastrophic Event Memorandum Account And COVID -19 Pandemic Protections Memorandum Account                        
General Rate Case [Line Items]                        
Public utilities, write-off of disallowed costs, before tax                       36
Public utilities, write-off of disallowed costs, after tax                       25
Southern California Gas Company | Catastrophic Event Memorandum Account And COVID -19 Pandemic Protections Memorandum Account | Income Statement Location [Axis]: us-gaap:OtherNonoperatingIncomeExpense                        
General Rate Case [Line Items]                        
Public utilities, write-off of disallowed costs, before tax                       7
Southern California Gas Company | Catastrophic Event Memorandum Account And COVID -19 Pandemic Protections Memorandum Account | Income Statement Location [Axis]: us-gaap:RegulatedOperatingRevenueGas                        
General Rate Case [Line Items]                        
Public utilities, write-off of disallowed costs, before tax                       $ 29
Southern California Gas Company | Catastrophic Event Memorandum Account And COVID -19 Pandemic Protections Memorandum Account | California Public Utilities Commission                        
General Rate Case [Line Items]                        
Approved recovery amount         $ 19              
Requested recovery amount         $ 55              
Southern California Gas Company | General Rate Case                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (217)        
Regulatory disallowances, after tax               157        
Southern California Gas Company | General Rate Case | Regulatory Disallowances Period, Prior Years                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (209)        
Regulatory disallowances, after tax               150        
Southern California Gas Company | General Rate Case | Regulatory Disallowances Period, Current Year                        
General Rate Case [Line Items]                        
Regulatory disallowances, net               (8)        
Regulatory disallowances, after tax               $ 7        
2024 General Rate Case | San Diego Gas and Electric Company | General Rate Case | California Public Utilities Commission | Revenue Requirement, Period One                        
General Rate Case [Line Items]                        
Requested recovery amount                     55  
2024 General Rate Case | San Diego Gas and Electric Company | General Rate Case | California Public Utilities Commission | Revenue Recognition, Period Two                        
General Rate Case [Line Items]                        
Requested recovery amount                     87  
2024 General Rate Case | San Diego Gas and Electric Company | General Rate Case | California Public Utilities Commission | Revenue Recognition, Period Three                        
General Rate Case [Line Items]                        
Requested recovery amount                     79  
2024 General Rate Case | Southern California Gas Company | General Rate Case | California Public Utilities Commission | Revenue Requirement, Period One                        
General Rate Case [Line Items]                        
Requested recovery amount                     86  
2024 General Rate Case | Southern California Gas Company | General Rate Case | California Public Utilities Commission | Revenue Recognition, Period Two                        
General Rate Case [Line Items]                        
Requested recovery amount                     122  
2024 General Rate Case | Southern California Gas Company | General Rate Case | California Public Utilities Commission | Revenue Recognition, Period Three                        
General Rate Case [Line Items]                        
Requested recovery amount                     109  
General Rate Case, Track 3 | San Diego Gas and Electric Company | General Rate Case                        
General Rate Case [Line Items]                        
Requested review and recovery of wildfire mitigation plan             $ 659          
Requested revenue amount   $ 766 621                  
Expected revenue increase from prior request     234                  
General rate case, expected recovery of pipeline safety enhancement plan costs           $ 240            
Approved revenue requirement     210                  
General Rate Case, Track 3 | Southern California Gas Company | General Rate Case                        
General Rate Case [Line Items]                        
General rate case, expected recovery of pipeline safety enhancement plan costs           $ 499            
Approved revenue requirement     $ 361                  
General Rate Case, Track 2 | San Diego Gas and Electric Company | General Rate Case                        
General Rate Case [Line Items]                        
Regulatory disallowances, net                     (245)  
2024 GRC, Interim Cost Recovery Mechanism | San Diego Gas and Electric Company | General Rate Case                        
General Rate Case [Line Items]                        
General rate case, expected recovery of pipeline safety enhancement plan costs                     17  
General rate case, recovery of pipeline safety enhancement plan costs                     193  
2024 GRC, Interim Cost Recovery Mechanism | Southern California Gas Company | General Rate Case                        
General Rate Case [Line Items]                        
General rate case, expected recovery of pipeline safety enhancement plan costs                     20  
General rate case, recovery of pipeline safety enhancement plan costs                     $ 341