REGULATORY MATTERS - COST OF CAPITAL & ENERGY EFFICIENCY (Details) - USD ($)	1 Months Ended				12 Months Ended		36 Months Ended
	Jan. 31, 2023	Dec. 31, 2022	Apr. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2021	Dec. 31, 2025	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
Receivables from revenues from contracts with customers		$ 2,334,000,000						$ 2,334,000,000	$ 1,977,000,000
California Public Utilities Commission
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]
Receivables from revenues from contracts with customers		$ 819,000,000						$ 819,000,000	751,000,000
San Diego Gas and Electric Company | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
CCM benchmark rate (as a percent)		4.367%				4.498%
Authorized weighting, total (as a percent)								100.00%
Weighted return on rate base, total (as a percent)								7.55%
CCM benchmark rate, percentage below (as a percent)						1.17%
San Diego Gas and Electric Company | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Authorized weighting, total (as a percent)							100.00%
Weighted return on rate base, total (as a percent)							7.18%
San Diego Gas and Electric Company | Authorized weighting | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt								45.25%
San Diego Gas and Electric Company | Authorized weighting | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt							45.25%
San Diego Gas and Electric Company | Authorized weighting | Preferred Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								2.75%
San Diego Gas and Electric Company | Authorized weighting | Preferred Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							2.75%
San Diego Gas and Electric Company | Authorized weighting | Common Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								52.00%
San Diego Gas and Electric Company | Authorized weighting | Common Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							52.00%
San Diego Gas and Electric Company | Return on Rate Base | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt								4.59%
San Diego Gas and Electric Company | Return on Rate Base | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt							4.05%
San Diego Gas and Electric Company | Return on Rate Base | Preferred Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								6.22%
San Diego Gas and Electric Company | Return on Rate Base | Preferred Equity | Subsequent Event | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
CCM requested return rate (as a percentage)	6.22%
San Diego Gas and Electric Company | Return on Rate Base | Preferred Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							6.22%
San Diego Gas and Electric Company | Return on Rate Base | Common Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								10.20%
San Diego Gas and Electric Company | Return on Rate Base | Common Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							9.95%
San Diego Gas and Electric Company | Weighted Return on Rate Base | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt								2.08%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt							1.83%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Preferred Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								0.17%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Preferred Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							0.17%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Common Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								5.30%
San Diego Gas and Electric Company | Weighted Return on Rate Base | Common Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							5.17%
SoCalGas
Public Utilities, General Disclosures [Line Items]
Receivables from revenues from contracts with customers		$ 1,311,000,000						$ 1,311,000,000	$ 1,139,000,000
SoCalGas | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
CCM benchmark rate (as a percent)						4.029%
Authorized weighting, total (as a percent)								100.00%
Weighted return on rate base, total (as a percent)								7.30%
SoCalGas | Energy Efficiency and Advocacy | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Energy Efficiency Program Inquiry fines that reduce revenue			$ 150,000	$ 10,000,000
SoCalGas | Subsequent Event | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
CCM benchmark rate (as a percent)					4.074%
SoCalGas | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Authorized weighting, total (as a percent)							100.00%
Weighted return on rate base, total (as a percent)							7.10%
SoCalGas | Authorized weighting | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt								45.60%
SoCalGas | Authorized weighting | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt							45.60%
SoCalGas | Authorized weighting | Preferred Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								2.40%
SoCalGas | Authorized weighting | Preferred Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							2.40%
SoCalGas | Authorized weighting | Common Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								52.00%
SoCalGas | Authorized weighting | Common Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							52.00%
SoCalGas | Return on Rate Base | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt								4.23%
SoCalGas | Return on Rate Base | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt							4.07%
SoCalGas | Return on Rate Base | Preferred Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								6.00%
SoCalGas | Return on Rate Base | Preferred Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							6.00%
SoCalGas | Return on Rate Base | Common Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								10.05%
SoCalGas | Return on Rate Base | Common Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							9.80%
SoCalGas | Weighted Return on Rate Base | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt								1.93%
SoCalGas | Weighted Return on Rate Base | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Plan percentage of capital structure allocated to debt							1.86%
SoCalGas | Weighted Return on Rate Base | Preferred Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								0.14%
SoCalGas | Weighted Return on Rate Base | Preferred Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							0.14%
SoCalGas | Weighted Return on Rate Base | Common Equity | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)								5.23%
SoCalGas | Weighted Return on Rate Base | Common Equity | Forecast | California Public Utilities Commission
Public Utilities, General Disclosures [Line Items]
Return on rate base (as a percent)							5.10%