DEBT AND CREDIT FACILITIES - NARRATIVE (Details) $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2024 USD ($) bank day line_of_credit	Mar. 31, 2024 USD ($) bank day line_of_credit lineOfCredit	Dec. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 9,900	$ 9,900
Primary committed lines of credit | lineOfCredit		7
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%	65.00%
Uncommitted letters of credit outstanding	$ 512	$ 512
6.875% Junior Subordinated Notes, Due October 1, 2054
Line of Credit Facility [Line Items]
Debt amount	$ 600	$ 600
Stated rate of debt (as a percent)	6.875%	6.875%
Proceeds from debt issuance	$ 593
Unamortized debt issuance costs and discounts	$ 7	$ 7
Debt instrument, interest rate, period (in years)	5 years	5 years
Number of days before interest rate period | day	2	2
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%	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%
Foreign Unsecured Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 200	$ 200
Line of credit, amount outstanding	30	30
SDG&E
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 1,500	$ 1,500
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%	65.00%
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	$ 600
Stated rate of debt (as a percent)	5.55%	5.55%
Proceeds from debt issuance	$ 587
Unamortized debt issuance costs and discounts	13	$ 13
SoCalGas
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 1,200	$ 1,200
Maximum ratio of indebtedness to total capitalization (as a percent)	65.00%	65.00%
SoCalGas | Secured Debt | Five Point Six Percent First Mortgage Bonds, Due April 1, 2054
Line of Credit Facility [Line Items]
Debt amount	$ 500	$ 500
Stated rate of debt (as a percent)	5.60%	5.60%
Proceeds from debt issuance	$ 491
Unamortized debt issuance costs and discounts	$ 9	$ 9
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
SI Partners and IEnova | IEnova Committed 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 Committed Line Of Credit Due 2024 | Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Variable percentage rate (in percent)		1.15%
Sempra Infrastructure | 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	$ 926	$ 926	$ 832
Weighted average interest rate (as a percent)	8.27%	8.27%	8.31%
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	$ 273	$ 273	$ 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