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REGULATORY MATTERS - COVID-19 PANDEMINC PROTECTIONS AND CPUC GRC (Details) - USD ($)
$ in Millions
1 Months Ended
May 31, 2022
May 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]        
Receivables from revenues from contracts with customers     $ 2,334 $ 1,977
San Diego Gas and Electric Company        
Public Utilities, General Disclosures [Line Items]        
Receivables from revenues from contracts with customers     819 751
San Diego Gas and Electric Company | 2019 GRC FD - 2022 Requirement | General Rate Case        
Public Utilities, General Disclosures [Line Items]        
Revenue increase   $ 87    
Percent increase (as a percent)   3.92%    
San Diego Gas and Electric Company | 2019 GRC FD - 2023 Requirement | General Rate Case        
Public Utilities, General Disclosures [Line Items]        
Revenue increase   $ 86    
Percent increase (as a percent)   3.70%    
San Diego Gas and Electric Company | 2024 GRC - 2024 Requirement | General Rate Case        
Public Utilities, General Disclosures [Line Items]        
Requested revenue requirements $ 3,000      
San Diego Gas and Electric Company | 2024 GRC - 2024 Requirement | General Rate Case | Minimum        
Public Utilities, General Disclosures [Line Items]        
Post-test year revenue annual increase 8.00%      
San Diego Gas and Electric Company | 2024 GRC - 2024 Requirement | General Rate Case | Maximum        
Public Utilities, General Disclosures [Line Items]        
Post-test year revenue annual increase 11.00%      
SoCalGas        
Public Utilities, General Disclosures [Line Items]        
Receivables from revenues from contracts with customers     1,311 1,139
SoCalGas | 2019 GRC FD - 2022 Requirement | General Rate Case        
Public Utilities, General Disclosures [Line Items]        
Revenue increase   $ 142    
Percent increase (as a percent)   4.53%    
SoCalGas | 2019 GRC FD - 2023 Requirement | General Rate Case        
Public Utilities, General Disclosures [Line Items]        
Revenue increase   $ 130    
Percent increase (as a percent)   3.97%    
SoCalGas | 2024 GRC - 2024 Requirement | General Rate Case        
Public Utilities, General Disclosures [Line Items]        
Requested revenue requirements $ 4,400      
SoCalGas | 2024 GRC - 2024 Requirement | General Rate Case | Minimum        
Public Utilities, General Disclosures [Line Items]        
Post-test year revenue annual increase 6.00%      
SoCalGas | 2024 GRC - 2024 Requirement | General Rate Case | Maximum        
Public Utilities, General Disclosures [Line Items]        
Post-test year revenue annual increase 8.00%      
Customers Under California Arrearage Payment Program | San Diego Gas and Electric Company        
Public Utilities, General Disclosures [Line Items]        
Receivables from revenues from contracts with customers     51 63
Customers Under California Arrearage Payment Program | SoCalGas        
Public Utilities, General Disclosures [Line Items]        
Receivables from revenues from contracts with customers     $ 59 $ 79