DEBT AND CREDIT FACILITIES - NARRATIVE (Details) $ in Millions	1 Months Ended				9 Months Ended
	Sep. 30, 2024 USD ($) bank business_day line_of_credit	Aug. 31, 2024 USD ($)	May 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2024 USD ($) line_of_credit bank business_day lineOfCredit	Jul. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,900				$ 9,900
Primary committed lines of credit | lineOfCredit					7
Ratio of indebtedness to net capital (in percent)	0.65				0.65
Available unused credit	$ 8,161				$ 8,161
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%				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%				5.75%
6.40% Junior Subordinated Notes And 6.875% Junior Subordinated Notes | Redemption period one
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)					100.00%
6.40% Junior Subordinated Notes And 6.875% Junior Subordinated Notes | Redemption period two
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage of principal amount redeemed (in percent)					102.00%
6.40% Junior Subordinated Notes, Due October 1, 2054
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)					2.632%
Debt amount	$ 1,250				$ 1,250
Stated rate of debt (as a percent)	6.40%				6.40%
Proceeds from debt issuance	$ 1,235
Unamortized debt issuance costs and discounts	$ 15				$ 15
Debt instrument, interest rate, period (in years)	5 years				5 years
Number of days before interest rate period | business_day	2				2
6.875% Junior Subordinated Notes, Due October 1, 2054
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)					2.789%
Debt amount			$ 500	$ 600
Stated rate of debt (as a percent)	6.875%				6.875%
Proceeds from debt issuance			489	593
Unamortized debt issuance costs and discounts			11	7
Accrued interest			$ 7
SDG&E
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 1,500				$ 1,500
Ratio of indebtedness to net capital (in percent)	0.65				0.65
Available unused credit	$ 1,116				$ 1,116
SDG&E | Secured Debt | 5.55% 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				$ 1,200
Ratio of indebtedness to net capital (in percent)	0.65				0.65
Available unused credit	$ 1,200				$ 1,200
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 | 5.6% First Mortgage Bonds, Due April 1, 2054
Line of Credit Facility [Line Items]
Debt amount		$ 600		$ 500
Stated rate of debt (as a percent)		5.05%		5.60%
Proceeds from debt issuance		$ 592		$ 491
Unamortized debt issuance costs and discounts		$ 8		$ 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				5.25
SI Partners and IEnova
Line of Credit Facility [Line Items]
Number of lines of credit | line_of_credit	3				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	$ 420				$ 420		$ 258
Weighted average interest rate (as a percent)	5.33%				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				$ 6,800
Term of debt instrument (in years)					7 years
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]
Maximum borrowing capacity	$ 1,300				$ 1,300
Term of debt instrument (in years)					5 years
Number of banks in syndicate | bank	7				7
Debt outstanding	$ 1,000				$ 1,000		$ 832
Weighted average interest rate (as a percent)	7.56%				7.56%		8.31%
ECA LNG Phase 1 | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 100				$ 200
Line of credit, amount outstanding	$ 14				$ 14
Variable percentage rate (in percent)					0.10%