REGULATORY MATTERS - COST OF CAPITAL & FERC (Details) - California Public Utilities Commission	12 Months Ended	36 Months Ended
	Sep. 30, 2023	Dec. 31, 2025
San Diego Gas and Electric Company | Subsequent Event
Public Utilities, General Disclosures [Line Items]
CCM benchmark rate (as a percent)	4.367%
San Diego Gas and Electric Company | Forecast
Public Utilities, General Disclosures [Line Items]
Authorized weighting (as a percent)		100.00%
Weighted return on rate base (as a percent)		7.18%
San Diego Gas and Electric Company | Authorized Weighting | Forecast
Public Utilities, General Disclosures [Line Items]
Approved debt capital structure (as a percent)		45.25%
San Diego Gas and Electric Company | Authorized Weighting | Forecast | 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 | Forecast | 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 | Forecast
Public Utilities, General Disclosures [Line Items]
Approved debt capital structure (as a percent)		4.05%
San Diego Gas and Electric Company | Return on Rate Base | Forecast | 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 | Forecast | Common Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)		9.95%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Forecast
Public Utilities, General Disclosures [Line Items]
Approved debt capital structure (as a percent)		1.83%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Forecast | 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 | Forecast | Common Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)		5.17%
Southern California Gas Company | Subsequent Event
Public Utilities, General Disclosures [Line Items]
CCM benchmark rate (as a percent)	4.074%
Southern California Gas Company | Forecast
Public Utilities, General Disclosures [Line Items]
Authorized weighting (as a percent)		100.00%
Weighted return on rate base (as a percent)		7.10%
Southern California Gas Company | Authorized Weighting | Forecast
Public Utilities, General Disclosures [Line Items]
Approved debt capital structure (as a percent)		45.60%
Southern California Gas Company | Authorized Weighting | Forecast | Preferred Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)		2.40%
Southern California Gas Company | Authorized Weighting | Forecast | 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 | Forecast
Public Utilities, General Disclosures [Line Items]
Approved debt capital structure (as a percent)		4.07%
Southern California Gas Company | Return on Rate Base | Forecast | 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 | Forecast | Common Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)		9.80%
Southern California Gas Company | Weighted Return on Rate Base | Forecast
Public Utilities, General Disclosures [Line Items]
Approved debt capital structure (as a percent)		1.86%
Southern California Gas Company | Weighted Return on Rate Base | Forecast | 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 | Forecast | Common Equity
Public Utilities, General Disclosures [Line Items]
Approved return on equity (as a percent)		5.10%