DEBT AND CREDIT FACILITIES - Other Sempra (Details) $ in Millions	1 Months Ended			9 Months Ended
	Aug. 31, 2025 USD ($) business_day	Apr. 30, 2025 USD ($)	Jan. 31, 2025 USD ($)	Sep. 30, 2025 USD ($)	Jul. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Line of Credit Facility [Line Items]
Total facility				$ 10,200
Loan Agreement To Finance Natural Gas Liquefaction Export Facility | ECA LNG Phase 1
Line of Credit Facility [Line Items]
Total facility				1,300	$ 1,500
Effective interest rate					2.29%
Debt instrument, basis spread on variable rate, minimum					0.10%
Debt outstanding				$ 1,200		$ 1,100
Weighted average interest rate (as a percent)				6.39%		7.29%
Loan Agreement To Finance Natural Gas Liquefaction Export Facility | IEnova
Line of Credit Facility [Line Items]
Maximum exposure under guarantor obligations				$ 1,226
Loan Agreement To Finance Natural Gas Liquefaction Export Facility | TotalEnergies SE
Line of Credit Facility [Line Items]
Maximum exposure under guarantor obligations				305
Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Port Arthur LNG
Line of Credit Facility [Line Items]
Debt outstanding				$ 2,200		$ 1,100
Weighted average interest rate (as a percent)				5.46%		5.33%
Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Port Arthur LNG | Domestic Line of Credit
Line of Credit Facility [Line Items]
Total facility				$ 6,800
Term of debt instrument (in years)				7 years
Senior Secured Notes Issued Jan 2025 | Port Arthur LNG | Senior Notes
Line of Credit Facility [Line Items]
Debt amount			$ 750
Stated rate of debt (as a percent)			6.27%
Proceeds from debt issuance			$ 742
Unamortized debt issuance costs			$ 8
Senior Secured Notes Issued Apr 2025 | Port Arthur LNG | Senior Notes
Line of Credit Facility [Line Items]
Debt amount		$ 250
Stated rate of debt (as a percent)		6.32%
Proceeds from debt issuance		$ 248
Unamortized debt issuance costs		$ 2
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Debt amount	$ 800
Stated rate of debt (as a percent)	6.375%
Number of days before interest rate period | business_day	2
Variable percentage rate (in percent)	2.632%
Proceeds from debt issuance	$ 791
Debt issuance costs	$ 9
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term One
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	100.00%
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term Two
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	100.00%
6.375%, Fixed-To-Fixed Reset Rate Junior Subordinated Notes, April 1, 2056 | Junior Subordinated Debt | Debt Instrument, Redemption, Term Three
Line of Credit Facility [Line Items]
Debt instrument, redemption price, percentage	102.00%
Other Long-Term Debt, 4.125% Junior Subordinated Notes April 1, 2052 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				4.125%
6.40% Junior Subordinated Notes, Due October 1, 2054 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				6.40%
6.875% Junior Subordinated Notes, Due October 1, 2054 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				6.875%
6.550% Junior Subordinated Notes Due 2055 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				6.55%
6.625% Junior Subordinated Notes Due 2055 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				6.625%
Other Long-Term Debt, 5.75% Junior Subordinated Notes Due 2079 | Junior Subordinated Debt
Line of Credit Facility [Line Items]
Stated rate of debt (as a percent)				5.75%