v3.25.2
SEMPRA - EQUITY AND EARNINGS PER COMMON SHARE - COMMON STOCK NARRATIVE (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Mar. 28, 2025
Nov. 30, 2024
SI Partners and ConocoPhillips | Port Arthur LNG            
Equity, Class of Treasury Stock [Line Items]            
Funding commitment, aggregate amount     $ 9,000.0      
SI Partners | Port Arthur LNG            
Equity, Class of Treasury Stock [Line Items]            
Funding commitment paid     $ 2,700.0      
SI Partners            
Equity, Class of Treasury Stock [Line Items]            
Ownership interest (as a percent)         70.00%  
Port Arthur LNG | SI Partners and ConocoPhillips            
Equity, Class of Treasury Stock [Line Items]            
Funding commitment (in percent)     110.00%      
Port Arthur LNG | SI Partners            
Equity, Class of Treasury Stock [Line Items]            
Guaranteed funding amount (in percent)     70.00%      
Common stock            
Equity, Class of Treasury Stock [Line Items]            
Shares withheld for tax purposes (in shares)     678,705 555,888    
Shares withheld for tax purposes     $ 58.0 $ 40.0    
At The Market Program Offering            
Equity, Class of Treasury Stock [Line Items]            
Aggregate sales price           $ 3,000.0
Underwriting commission, percent           1.00%
Aggregate sales price remaining     $ 2,600.0      
Number of shares issued since inception (in shares)     4,996,591      
Average price per share since inception (usd per share)     $ 83.175      
Q4 2024 Forward Sale Agreement            
Equity, Class of Treasury Stock [Line Items]            
Number of shares sold (in shares)   2,909,274        
Sale of stock, price per share (usd per share)   $ 92.1546        
Expected net proceeds   $ 268.0        
Sales commissions   $ 2.4        
Number of shares that remain to be settled (in shares)     2,909,274      
Q1 2025 Forward Sale Agreement            
Equity, Class of Treasury Stock [Line Items]            
Number of shares sold (in shares) 2,087,317          
Sale of stock, price per share (usd per share) $ 70.6593          
Expected net proceeds $ 147.0          
Sales commissions $ 1.3          
Number of shares that remain to be settled (in shares)     2,087,317