DEBT AND CREDIT FACILITIES - FIRST MORTGAGE BONDS (Details) - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2023	May 31, 2023	Mar. 31, 2023	Dec. 31, 2023
SDG&E
Debt Instrument [Line Items]
First mortgage bonds available for future issuance				$ 8,200
SDG&E | Five Point Three Five Percent First Mortgage Bonds Due April 1, 2053
Debt Instrument [Line Items]
Debt amount			$ 800
Stated percentage rate			5.35%
Proceeds from issuance of debt			$ 783
Underwriting discounts and debt issuance costs			$ 17
SDG&E | Four Point Nine Five Percent First Mortgage Bonds Due August 15, 2028
Debt Instrument [Line Items]
Debt amount	$ 600
Stated percentage rate	4.95%
Proceeds from issuance of debt	$ 593
Underwriting discounts and debt issuance costs	$ 7
SoCalGas
Debt Instrument [Line Items]
First mortgage bonds available for future issuance				$ 1,600
SoCalGas | Five Point Two Zero Percent First Mortgage Bonds Due June 1, 2033
Debt Instrument [Line Items]
Debt amount		$ 500
Stated percentage rate		5.20%
Proceeds from issuance of debt		$ 495
Underwriting discounts and debt issuance costs		5
SoCalGas | Five Point Seven Five Percent First Mortgage Bonds Due June 1, 2053
Debt Instrument [Line Items]
Debt amount		$ 500
Stated percentage rate		5.75%
Proceeds from issuance of debt		$ 493
Underwriting discounts and debt issuance costs		7
SoCalGas | Senior Unsecured Floating Rate Notes | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt amount		300
SoCalGas | Term Loan Due 2023 | Secured Debt
Debt Instrument [Line Items]
Debt amount		$ 800