DEBT AND CREDIT FACILITIES - NARRATIVE (Details)	1 Months Ended						9 Months Ended
	Aug. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	May 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Aug. 31, 2022 USD ($)	Jul. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) lineOfCredit bank	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 9,900,000,000
Primary committed lines of credit | lineOfCredit							7
Maximum ratio of indebtedness to total capitalization (as a percent)							65.00%
Uncommitted letters of credit outstanding							$ 508,000,000
Issuances of debt (maturities greater than 90 days)							6,911,000,000	$ 6,711,000,000
Foreign Unsecured Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity							200,000,000
Line of credit, amount outstanding							$ 37,000,000
Five Point Four Zero Percent Senior Unsecured Notes | Unsecured Debt
Line of Credit Facility [Line Items]
Debt amount		$ 550,000,000
Stated rate of debt (as a percent)		5.40%
Proceeds from debt issuance		$ 545,000,000
Unamortized debt issuance costs and discounts		5,000,000
Five Point Five Zero Percent Senior Unsecured Notes | Unsecured Debt
Line of Credit Facility [Line Items]
Debt amount		$ 700,000,000
Stated rate of debt (as a percent)		5.50%
Proceeds from debt issuance		$ 692,000,000
Unamortized debt issuance costs and discounts		$ 8,000,000
SI Partners
Line of Credit Facility [Line Items]
Maximum adjustment EBITDA allowed							5.25
SI Partners | 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]
Ownership interest (as a percent)				70.00%
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 200,000,000
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030 | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 200,000,000
Term of debt instrument (in years)				7 years
SI Partners and IEnova | IEnova Uncommitted Line Of Credit Due 2024 | Interbank Equilibrium Interest Rate
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)							1.05%
SI Partners and IEnova | IEnova Uncommitted Line Of Credit Due 2024 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)		1.15%
SI Partners and IEnova | IEnova Uncommitted Line Of Credit Due 2024 | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)		1.05%
Southern California Gas Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 1,200,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)							65.00%
Issuances of debt (maturities greater than 90 days)							$ 997,000,000	1,497,000,000
Debt issuance costs							9,000,000	6,000,000
Southern California Gas Company | Term Loan Due 2023
Line of Credit Facility [Line Items]
Issuances of debt (maturities greater than 90 days)					$ 800,000,000
Southern California Gas Company | Term Loan Due 2023 | Secured Debt
Line of Credit Facility [Line Items]
Term of debt instrument (in years)						364 days
Variable percentage rate (in percent)						0.70%
Debt amount						$ 800,000,000
Southern California Gas Company | Term Loan Due 2023 | Secured Debt
Line of Credit Facility [Line Items]
Debt amount						$ 800,000,000
Southern California Gas Company | Five Point Two Zero Percent Senior Secured Notes | Secured Debt
Line of Credit Facility [Line Items]
Debt amount			$ 500,000,000
Stated rate of debt (as a percent)			5.20%
Proceeds from debt issuance			$ 495,000,000
Unamortized debt issuance costs and discounts			5,000,000
Southern California Gas Company | Five Point Seven Five Percent Senior Secured Notes | Secured Debt
Line of Credit Facility [Line Items]
Debt amount			$ 500,000,000
Stated rate of debt (as a percent)			5.75%
Proceeds from debt issuance			$ 493,000,000
Unamortized debt issuance costs and discounts			$ 7,000,000
Southern California Gas Company | Senior Unsecured Floating Rate Notes | Unsecured Debt
Line of Credit Facility [Line Items]
Debt amount		$ 300,000,000
San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 1,500,000,000
Maximum ratio of indebtedness to total capitalization (as a percent)							65.00%
Issuances of debt (maturities greater than 90 days)							$ 1,389,000,000	1,395,000,000
Debt issuance costs							$ 12,000,000	$ 9,000,000
San Diego Gas and Electric Company | Five Point Three Five Zero Percent Senior Secured Notes | Secured Debt
Line of Credit Facility [Line Items]
Debt amount				$ 800,000,000
Stated rate of debt (as a percent)				5.35%
Proceeds from debt issuance				$ 783,000,000
Unamortized debt issuance costs and discounts				$ 17,000,000
San Diego Gas and Electric Company | Four Point Nine Percent Green First Mortgage Bonds | Secured Debt
Line of Credit Facility [Line Items]
Debt amount	$ 600,000,000
Stated rate of debt (as a percent)	4.95%
Proceeds from debt issuance	$ 593,000,000
Unamortized debt issuance costs and discounts	$ 7,000,000
Sempra LNG | Loan Agreement To Finance Natural Gas Liquefaction Export Facility
Line of Credit Facility [Line Items]
Term of debt instrument (in years)							5 years
Number of banks in syndicate | bank							7
Weighted average interest rate (as a percent)							8.35%		7.54%
Sempra Infrastructure | Loan Agreement To Finance Natural Gas Liquefaction Export Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 1,300,000,000
Debt outstanding							$ 782,000,000		$ 575,000,000
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]
Term of debt instrument (in years)				20 years
Debt outstanding							$ 243,000,000
Weighted average interest rate (as a percent)							5.71%
Upfront equity funding amount				$ 4,700,000,000
Debt issuance costs				$ 200,000,000
Commitment fee (in percent)				30.00%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Minimum amount of the projected amount of term loans (in percent)				60.00%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Secured Overnight Financing Rate (SOFR) | Interest Rate, Before Completion of Phase 1
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)				2.00%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Secured Overnight Financing Rate (SOFR) | Interest Rate, After Completion of Phase 1
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)				2.25%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Line of Credit | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Minimum amount of the projected amount of term loans (in percent)				60.00%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Domestic Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 6,800,000,000
SI Partners and ConocoPhillips | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project
Line of Credit Facility [Line Items]
Equity funding provided				$ 2,800,000,000
ConocoPhillips | 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]
Ownership interest (as a percent)				30.00%