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DEBT AND CREDIT FACILITIES - LONG-TERM DEBT (Details) - USD ($)
1 Months Ended 3 Months Ended
Jan. 11, 2022
Mar. 31, 2022
Feb. 28, 2022
Dec. 31, 2020
May 18, 2022
Mar. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]              
Maximum borrowing capacity   $ 9,535,000,000       $ 9,535,000,000  
Sempra Energy              
Debt Instrument [Line Items]              
Maximum borrowing capacity   3,185,000,000       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       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  
Term of debt instrument     2 years        
Spread on variable rate (as a percent)     0.625%        
San Diego Gas and Electric Company | Term Loan Due 2024 | Forecast              
Debt Instrument [Line Items]              
Debt Instrument Maximum Borrowing Amount         $ 400,000,000    
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       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       $ 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            
Debt issued as a percentage of principal 98.903%            
Sempra LNG | ECA LNG JV              
Debt Instrument [Line Items]              
Ownership percentage in consolidated entity       83.40%      
Sempra LNG | Loan Agreement To Finance Natural Gas Liquefaction Export Facility              
Debt Instrument [Line Items]              
Term of debt instrument       5 years      
Maximum borrowing capacity             $ 1,600,000,000
Weighted average interest rate (as a percent)   3.71%       3.71% 2.93%
Subsidiary of TOTAL SE | ECA LNG JV              
Debt Instrument [Line Items]              
Ownership percentage in consolidated entity       16.60%      
Sempra Infrastructure | Other Long-Term Debt, Variable Rate Loan Due December 2025              
Debt Instrument [Line Items]              
Debt outstanding   $ 392,000,000       $ 392,000,000 $ 341,000,000