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DEBT AND CREDIT FACILITIES - LONG-TERM DEBT (Details)
1 Months Ended 3 Months Ended
Mar. 31, 2022
USD ($)
Feb. 28, 2022
USD ($)
Jan. 31, 2022
USD ($)
Dec. 31, 2020
USD ($)
bank
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Jul. 31, 2022
USD ($)
bank
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]                
Maximum borrowing capacity         $ 9,535,000,000      
Sempra Energy                
Debt Instrument [Line Items]                
Maximum borrowing capacity         3,185,000,000      
Sempra Energy | Three Point Three Percent Senior Unsecured Notes                
Debt Instrument [Line Items]                
Debt amount $ 750,000,000         $ 750,000,000    
Stated rate of debt (as a percent) 3.30%         3.30%    
Proceeds from debt issuance $ 745,000,000              
Unamortized debt issuance costs 5,000,000         $ 5,000,000    
Sempra Energy | Three Point Seven Zero Percent Senior Unsecured Notes                
Debt Instrument [Line Items]                
Debt amount $ 500,000,000         $ 500,000,000    
Stated rate of debt (as a percent) 3.70%         3.70%    
Proceeds from debt issuance $ 494,000,000              
Unamortized debt issuance costs 6,000,000         $ 6,000,000    
San Diego Gas and Electric Company                
Debt Instrument [Line Items]                
Maximum borrowing capacity         1,500,000,000      
San Diego Gas and Electric Company | Term Loan Due 2024                
Debt Instrument [Line Items]                
Debt amount   $ 400,000,000            
Proceeds from debt issuance         200,000,000 200,000,000    
Term of debt instrument   2 years            
Spread on variable rate (as a percent)   0.625%            
San Diego Gas and Electric Company | Three Point Zero Percent First Mortgage Bonds                
Debt Instrument [Line Items]                
Debt amount $ 500,000,000         $ 500,000,000    
Stated rate of debt (as a percent) 3.00%         3.00%    
Proceeds from debt issuance $ 494,000,000              
Unamortized debt issuance costs 6,000,000         $ 6,000,000    
San Diego Gas and Electric Company | Three Point Seven Zero Percent First Mortgage Bonds                
Debt Instrument [Line Items]                
Debt amount $ 500,000,000         $ 500,000,000    
Stated rate of debt (as a percent) 3.70%         3.70%    
Proceeds from debt issuance $ 492,000,000              
Unamortized debt issuance costs 8,000,000         $ 8,000,000    
Southern California Gas Company                
Debt Instrument [Line Items]                
Maximum borrowing capacity         750,000,000      
Southern California Gas Company | Two Point Nine Five Percent Senior Unsecured Notes                
Debt Instrument [Line Items]                
Debt amount $ 700,000,000         $ 700,000,000    
Stated rate of debt (as a percent) 2.95%         2.95%    
Proceeds from debt issuance $ 691,000,000              
Unamortized debt issuance costs $ 9,000,000         $ 9,000,000    
SI Partners                
Debt Instrument [Line Items]                
Maximum borrowing capacity         $ 1,000,000,000      
SI Partners | Senior Notes 3.25% Due 2032                
Debt Instrument [Line Items]                
Debt amount     $ 400,000,000          
Stated rate of debt (as a percent)     3.25%          
Proceeds from debt issuance     $ 390,000,000          
Unamortized debt issuance costs     $ 10,000,000          
Sempra LNG | Loan Agreement To Finance Natural Gas Liquefaction Export Facility                
Debt Instrument [Line Items]                
Term of debt instrument       5 years        
Number of banks in syndicate | bank       9        
Weighted average interest rate (as a percent)         4.37%     2.93%
Sempra LNG | Loan Agreement To Finance Natural Gas Liquefaction Export Facility | Subsequent Event                
Debt Instrument [Line Items]                
Number of banks in syndicate | bank             9  
Sempra LNG | Loan Agreement To Finance Natural Gas Liquefaction Export Facility, Number Of Banks Replaced In Amendment                
Debt Instrument [Line Items]                
Debt outstanding         $ 61,000,000      
Sempra LNG | Loan Agreement To Finance Natural Gas Liquefaction Export Facility, Number Of Banks Replaced In Amendment | Subsequent Event                
Debt Instrument [Line Items]                
Maximum borrowing capacity             $ 203,000,000  
Number of banks in lending group replaced             2  
Number of banks in syndicate after amendment | bank             7  
Subsidiary of TOTAL SE | ECA LNG JV                
Debt Instrument [Line Items]                
Ownership percentage in consolidated entity       16.60%        
Sempra Infrastructure | ECA LNG JV                
Debt Instrument [Line Items]                
Ownership percentage in consolidated entity       83.40%        
Sempra Infrastructure | Loan Agreement To Finance Natural Gas Liquefaction Export Facility                
Debt Instrument [Line Items]                
Maximum borrowing capacity       $ 1,600,000,000        
Sempra Infrastructure | Other Long-Term Debt, Variable Rate Loan Due December 2025                
Debt Instrument [Line Items]                
Debt outstanding         $ 455,000,000     $ 341,000,000