v3.26.3
REGULATORY MATTERS - COST OF CAPITAL (Details) - California Public Utilities Commission
 9 Months Ended 36 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Public Utilities, General Disclosures [Line Items]    
CCM benchmark rate, variable rate (as a percent)   1.00%
San Diego Gas and Electric Company    
Public Utilities, General Disclosures [Line Items]    
Authorized weighting (as a percent) 100.00%  
Weighted return on rate base (as a percent) 7.45%  
San Diego Gas and Electric Company | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Weighted requested return on rate base (as a percent) 7.41%  
San Diego Gas and Electric Company | Authorized weighting    
Public Utilities, General Disclosures [Line Items]    
Approved debt capital structure (as a percent) 45.25%  
San Diego Gas and Electric Company | Authorized weighting | Preferred Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 2.75%  
San Diego Gas and Electric Company | Authorized weighting | Common Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 52.00%  
San Diego Gas and Electric Company | Return on rate base    
Public Utilities, General Disclosures [Line Items]    
Approved debt capital structure (as a percent) 4.34%  
San Diego Gas and Electric Company | Return on rate base | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested debt capital structure (as a percent) 4.59%  
San Diego Gas and Electric Company | Return on rate base | Preferred Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 6.22%  
San Diego Gas and Electric Company | Return on rate base | Preferred Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 6.22%  
San Diego Gas and Electric Company | Return on rate base | Common Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 10.23%  
San Diego Gas and Electric Company | Return on rate base | Common Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 9.93%  
San Diego Gas and Electric Company | Weighted return on rate base    
Public Utilities, General Disclosures [Line Items]    
Approved debt capital structure (as a percent) 1.96%  
San Diego Gas and Electric Company | Weighted return on rate base | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested debt capital structure (as a percent) 2.08%  
San Diego Gas and Electric Company | Weighted return on rate base | Preferred Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 0.17%  
San Diego Gas and Electric Company | Weighted return on rate base | Preferred Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 0.17%  
San Diego Gas and Electric Company | Weighted return on rate base | Common Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 5.32%  
San Diego Gas and Electric Company | Weighted return on rate base | Common Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 5.16%  
Southern California Gas Company    
Public Utilities, General Disclosures [Line Items]    
Authorized weighting (as a percent) 100.00%  
Weighted return on rate base (as a percent) 7.49%  
Southern California Gas Company | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Weighted requested return on rate base (as a percent) 7.52%  
Southern California Gas Company | Authorized weighting    
Public Utilities, General Disclosures [Line Items]    
Approved debt capital structure (as a percent) 45.60%  
Southern California Gas Company | Authorized weighting | Preferred Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 2.40%  
Southern California Gas Company | Authorized weighting | Common Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 52.00%  
Southern California Gas Company | Return on rate base    
Public Utilities, General Disclosures [Line Items]    
Approved debt capital structure (as a percent) 4.63%  
Southern California Gas Company | Return on rate base | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested debt capital structure (as a percent) 5.02%  
Southern California Gas Company | Return on rate base | Preferred Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 6.00%  
Southern California Gas Company | Return on rate base | Preferred Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 6.00%  
Southern California Gas Company | Return on rate base | Common Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 10.08%  
Southern California Gas Company | Return on rate base | Common Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 9.78%  
Southern California Gas Company | Weighted return on rate base    
Public Utilities, General Disclosures [Line Items]    
Approved debt capital structure (as a percent) 2.11%  
Southern California Gas Company | Weighted return on rate base | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested debt capital structure (as a percent) 2.29%  
Southern California Gas Company | Weighted return on rate base | Preferred Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 0.14%  
Southern California Gas Company | Weighted return on rate base | Preferred Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 0.14%  
Southern California Gas Company | Weighted return on rate base | Common Equity    
Public Utilities, General Disclosures [Line Items]    
Approved return on equity (as a percent) 5.24%  
Southern California Gas Company | Weighted return on rate base | Common Equity | Proposed Cost of Capital 2026-2028    
Public Utilities, General Disclosures [Line Items]    
Requested return on equity (as a percent) 5.09%