DEBT AND CREDIT FACILITIES - NARRATIVE (Details) $ in Millions	1 Months Ended	3 Months Ended
	May 31, 2024 USD ($)	Mar. 31, 2025 USD ($) lineOfCredit	Dec. 31, 2024 USD ($)
Line of Credit Facility [Line Items]
Total facility		$ 9,900
Primary committed lines of credit | lineOfCredit		7
Ratio of indebtedness to net capital (in percent)		0.65
SDG&E
Line of Credit Facility [Line Items]
Total facility		$ 1,500
Ratio of indebtedness to net capital (in percent)		0.65
SoCalGas
Line of Credit Facility [Line Items]
Total facility		$ 1,200
Ratio of indebtedness to net capital (in percent)		0.65
SoCalGas | 364-Day Term Loan, Due May 22,2025
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)	0.80%
Credit adjustment spread	0.10%
SoCalGas | Line of Credit | 364-Day Term Loan, Due May 22,2025 | Secured Debt
Line of Credit Facility [Line Items]
Debt amount	$ 500		$ 700
Term of debt instrument (in years)	364 days
Line of credit facility, accordion feature, increase limit	$ 300
SI Partners
Line of Credit Facility [Line Items]
Maximum adjustment EBITDA allowed		5.25
SI Partners and IEnova
Line of Credit Facility [Line Items]
Number of lines of credit | lineOfCredit		3
ECA LNG Phase 1 | Interbank Equilibrium Interest Rate
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)		1.54%
ECA LNG Phase 1 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)		1.64%
ECA LNG Phase 1 | Loan Agreement To Finance Natural Gas Liquefaction Export Facility
Line of Credit Facility [Line Items]
Total facility		$ 1,300
Term of debt instrument (in years)		5 years
ECA LNG Phase 1 | Line of Credit
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)		0.10%