DEBT AND CREDIT FACILITIES - NARRATIVE (Details) $ in Millions	1 Months Ended		3 Months Ended	6 Months Ended
	May 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	May 30, 2024 USD ($)	Jun. 30, 2024 USD ($) lineOfCredit bank day line_of_credit	Dec. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 9,900
Primary committed lines of credit | lineOfCredit				7
Ratio of indebtedness to net capital (in percent)				0.65
Available unused credit				$ 7,958
6.875% Junior Subordinated Notes, Due October 1, 2054
Line of Credit Facility [Line Items]
Debt amount	$ 500	$ 600
Stated rate of debt (as a percent)				6.875%
Proceeds from debt issuance	489	593
Unamortized debt issuance costs and discounts	$ 11	7
Debt instrument, interest rate, period (in years)				5 years
Number of days before interest rate period | day				2
Accrued interest			$ 7
6.875% Junior Subordinated Notes, Due October 1, 2054 | Redemption period one
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)				100.00%
6.875% Junior Subordinated Notes, Due October 1, 2054 | Redemption period two
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)				100.00%
6.875% Junior Subordinated Notes, Due October 1, 2054 | Redemption period three
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)				102.00%
6.875% Junior Subordinated Notes, Due October 1, 2054 | Five-Year US Treasury Rate
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)				2.789%
Other Long-Term Debt, 4.125% Junior Subordinated Notes Due 2052
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				4.125%
Other Long-Term Debt, 5.75% Junior Subordinated Notes Due 2079
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				5.75%
ECA LNG Phase 1
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 200
Line of credit, amount outstanding				26
SDG&E
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 1,500
Ratio of indebtedness to net capital (in percent)				0.65
Available unused credit				$ 1,500
SDG&E | Secured Debt | Five Point Five Five Percent First Mortgage Bonds Due April 15, 2054
Line of Credit Facility [Line Items]
Debt amount		$ 600
Stated rate of debt (as a percent)		5.55%
Proceeds from debt issuance		$ 587
Unamortized debt issuance costs and discounts		13
SoCalGas
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 1,200
Ratio of indebtedness to net capital (in percent)				0.65
Available unused credit				$ 1,094
SoCalGas | 364-Day Term Loan, Due May 22,2025 | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)	0.80%
SoCalGas | 364-Day Term Loan, Due May 22,2025 | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Two
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)	0.10%
SoCalGas | Secured Debt | Five Point Six Percent First Mortgage Bonds, Due April 1, 2054
Line of Credit Facility [Line Items]
Debt amount		$ 500
Stated rate of debt (as a percent)		5.60%
Proceeds from debt issuance		$ 491
Unamortized debt issuance costs and discounts		$ 9
SoCalGas | Line of Credit | 364-Day Term Loan, Due May 22,2025 | Secured Debt
Line of Credit Facility [Line Items]
Debt amount	$ 500
Term of debt instrument (in years)	364 days
Proceeds from lines of credit	$ 300
Available unused credit	200
Line of credit facility, accordion feature, increase limit	$ 500
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 | line_of_credit				3
IEnova | ECA LNG JV
Line of Credit Facility [Line Items]
Ownership percentage in consolidated entity (in percentage)				83.40%
Subsidiary of TOTAL SE | ECA LNG JV
Line of Credit Facility [Line Items]
Ownership percentage in consolidated entity (in percentage)				16.60%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project
Line of Credit Facility [Line Items]
Debt outstanding				$ 289	$ 258
Weighted average interest rate (as a percent)				5.33%	5.81%
Port Arthur LNG | Domestic Line of Credit | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 6,800
Term of debt instrument (in years)				7 years
ECA LNG Phase 1 | IEnova Committed Line Of Credit Due 2024 | Interbank Equilibrium Interest Rate
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)				1.05%
ECA LNG Phase 1 | IEnova Committed Line Of Credit Due 2024 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)				1.15%
ECA LNG Phase 1 | Loan Agreement To Finance Natural Gas Liquefaction Export Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 1,300
Term of debt instrument (in years)				5 years
Number of banks in syndicate | bank				7
Debt outstanding				$ 994	$ 832
Weighted average interest rate (as a percent)				8.29%	8.31%