DEBT AND CREDIT FACILITIES - NARRATIVE (Details)		1 Months Ended					6 Months Ended
	Mar. 20, 2023 USD ($)	Jun. 30, 2023 USD ($) bank	May 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Aug. 31, 2022 USD ($)	Jul. 31, 2022 USD ($)	Jun. 30, 2023 USD ($) bank lineOfCredit	Jun. 30, 2022 USD ($)	Mar. 21, 2023 USD ($)	Dec. 31, 2022 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 9,900,000,000					$ 9,900,000,000
Primary committed lines of credit | lineOfCredit							8
Uncommitted letters of credit outstanding		514,000,000					$ 514,000,000
Issuances of debt (maturities greater than 90 days)							5,614,000,000	$ 4,818,000,000
Foreign Unsecured Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		200,000,000					200,000,000
Amount available		32,000,000					32,000,000
Five Point Four Zero Percent Senior Unsecured Notes | Unsecured Debt
Line of Credit Facility [Line Items]
Debt amount		$ 550,000,000					$ 550,000,000
Stated rate of debt (as a percent)		5.40%					5.40%
Proceeds from debt issuance		$ 545,000,000
Unamortized debt issuance costs		5,000,000					$ 5,000,000
Five Point Five Zero Percent Senior Unsecured Notes | Unsecured Debt
Line of Credit Facility [Line Items]
Debt amount		$ 700,000,000					$ 700,000,000
Stated rate of debt (as a percent)		5.50%					5.50%
Proceeds from debt issuance		$ 692,000,000
Unamortized debt issuance costs		$ 8,000,000					$ 8,000,000
Sempra U.S.
Line of Credit Facility [Line Items]
Maximum ratio of indebtedness to total capitalization (as a percent)		65.00%					65.00%
SI Partners
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,000,000,000					$ 1,000,000,000
Maximum adjustment EBITDA allowed		5.25					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					$ 200,000,000
Port Arthur LNG | Port Arthur LNG Committed Line Of Credit Due 2030 | Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity		200,000,000					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					200,000,000
Term of debt instrument (in years)				7 years
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,500,000,000					$ 1,500,000,000
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024 | Interbank Equilibrium Interest Rate
Line of Credit Facility [Line Items]
Variable percentage rate							1.05%
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024 | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Variable percentage rate		1.05%
IEnova And SI Partners | IEnova Committed Line Of Credit Due 2024 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate		1.15%
Southern California Gas Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,200,000,000					$ 1,200,000,000
Issuances of debt (maturities greater than 90 days)							997,000,000	697,000,000
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						0.70%
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			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			$ 7,000,000
Southern California Gas Company | Senior Unsecured Floating Rate Notes | Secured Debt
Line of Credit Facility [Line Items]
Debt amount		300,000,000					300,000,000
San Diego Gas and Electric Company
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 1,500,000,000					1,500,000,000
Issuances of debt (maturities greater than 90 days)							792,000,000	1,395,000,000
Debt issuance costs							$ 9,000,000	$ 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				$ 17,000,000
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					7
Weighted average interest rate (as a percent)		8.20%					8.20%			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					$ 1,300,000,000
Debt outstanding		708,000,000					$ 708,000,000			$ 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 | 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 | Loans Payable
Line of Credit Facility [Line Items]
Term of debt instrument (in years)				20 years
Debt amount		6,800,000,000					$ 6,800,000,000
Debt outstanding		$ 228,000,000					$ 228,000,000
Weighted average interest rate (as a percent)		5.58%					5.58%
Upfront equity funding amount				$ 4,700,000,000					$ 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 | Loans Payable | 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 | Loans Payable | Secured Overnight Financing Rate (SOFR) | Interest Rate, Before Completion of Phase 1
Line of Credit Facility [Line Items]
Variable percentage rate				2.00%
Port Arthur LNG | Loan Agreement To Finance The Cost Of Development And Construction Of The PA LNG Phase 1 Project | Loans Payable | Secured Overnight Financing Rate (SOFR) | Interest Rate, After Completion of Phase 1
Line of Credit Facility [Line Items]
Variable percentage rate				2.25%
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%
Sempra
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 4,000,000,000					$ 4,000,000,000