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First mortgage bonds amount available for future issuance.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Fixed interest rate related to the interest rate derivative.

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Nominal or face amount used to calculate payments on the derivative liability.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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DEBT AND CREDIT FACILITIES - NARRATIVE (Details)			1 Months Ended					12 Months Ended
DEBT AND CREDIT FACILITIES - NARRATIVE (Details)	Aug. 14, 2019 USD ($)	Jan. 12, 2018	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	May 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) lender	Nov. 30, 2019 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding				$ 647,000,000				$ 647,000,000
Unsecured debt				11,600,000,000				11,600,000,000
Callable long-term debt, not subject to make-whole provisions				1,946,000,000				1,946,000,000
Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount, Per Note					$ 25
Junior Subordinated Debt [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Stated percentage rate					5.75%
Debt amount					$ 758,000,000
Proceeds from Debt, Net of Issuance Costs					733,000,000
Debt Issuance Costs, Gross					$ 25,000,000
Otay Mesa VIE [Member] \| Variable-Rate Loan. Due August 2024 [Member]
Debt Instrument [Line Items]
Proceeds from (Repayments of) Debt	$ (211,000,000)
Sempra Mexico [Member] \| IEnova Loan Agreement [Member]
Debt Instrument [Line Items]
Proceeds from Debt, Net of Issuance Costs				190,000,000
Debt Issuance Costs, Gross				$ 10,000,000				10,000,000
Term of contract				15 years
Sempra Mexico [Member] \| IEnova Loan Agreement [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable percentage rate				2.25%
Sempra Energy [Member]
Debt Instrument [Line Items]
Total facility				$ 1,250,000,000				1,250,000,000
Available unused credit				$ 1,250,000,000				$ 1,250,000,000
Sempra Energy [Member] \| Floating Rate Notes Due Twenty Nineteen [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable percentage rate		0.25%
Sempra Energy [Member] \| Floating Rate Notes Due Twenty Twenty One [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable percentage rate		0.50%
Sempra U.S. Businesses [Member]
Debt Instrument [Line Items]
Lines of Credit Facility, Number of Lenders \| lender								23
Line of Credit Facility, Lenders, Percent of Facility								6.00%
Line Of Credit Facility, Maximum Ratio Of Indebtedness To Total Capitalization				65.00%				65.00%
Total facility				$ 6,685,000,000				$ 6,685,000,000
Available unused credit				$ 4,351,000,000				$ 4,351,000,000
Sempra Energy Consolidated [Member]
Debt Instrument [Line Items]
Weighted average interest rate on total short-term debt outstanding				2.31%			2.99%	2.31%
Southern California Gas Company [Member]
Debt Instrument [Line Items]
Line Of Credit Facility, Maximum Ratio Of Indebtedness To Total Capitalization				65.00%				65.00%
Total facility				$ 750,000,000				$ 750,000,000
Available unused credit				$ 120,000,000				$ 120,000,000
Weighted average interest rate on total short-term debt outstanding				1.86%			2.58%	1.86%
Unsecured debt				$ 9,000,000				$ 9,000,000
Callable long-term debt, not subject to make-whole provisions				4,000,000				4,000,000
First mortgage bonds available for future issuance				1,300,000,000				1,300,000,000
Gross long-term debt				$ 3,800,000,000			$ 3,450,000,000	$ 3,800,000,000
Southern California Gas Company [Member] \| First Mortgage Bonds, Due June 2050 [Member]
Debt Instrument [Line Items]
Stated percentage rate					3.95%
Southern California Gas Company [Member] \| Bonds [Member] \| First Mortgage Bonds, Due June 2050 [Member]
Debt Instrument [Line Items]
Debt amount					$ 350,000,000
Proceeds from Debt, Net of Issuance Costs					345,000,000
Debt Issuance Costs, Gross					$ 5,000,000
OMEC LLC [Member] \| Secured Debt [Member] \| December 2018 OMEC Loan Agreement [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable percentage rate							2.00%
San Diego Gas and Electric Company [Member]
Debt Instrument [Line Items]
Line Of Credit Facility, Maximum Ratio Of Indebtedness To Total Capitalization				65.00%				65.00%
Total facility				$ 1,500,000,000				$ 1,500,000,000
Available unused credit				$ 1,420,000,000				$ 1,420,000,000
Weighted average interest rate on total short-term debt outstanding				1.97%			2.97%	1.97%
Callable long-term debt, not subject to make-whole provisions				$ 251,000,000				$ 251,000,000
First mortgage bonds available for future issuance				6,400,000,000				6,400,000,000
Gross long-term debt				5,140,000,000			$ 4,776,000,000	5,140,000,000
San Diego Gas and Electric Company [Member] \| Bonds [Member] \| FirstMortgageBondsDueJune2049 [Member]
Debt Instrument [Line Items]
Stated percentage rate						4.10%
Debt amount						$ 400,000,000
Proceeds from Debt, Net of Issuance Costs						$ 396,000,000
Debt Issuance Costs, Gross				$ 4,000,000				$ 4,000,000
Derivative Instrument, Interest Rate Hedge Maturity in 2034 [Member]
Debt Instrument [Line Items]
Notional amount of derivative liability									$ 200,000,000
Fixed interest rate after floating to fixed interest rate swaps									4.03%
Subsequent Event [Member] \| Southern California Gas Company [Member] \| First Mortgage Bonds, Due June 2050 [Member]
Debt Instrument [Line Items]
Stated percentage rate			2.55%
Subsequent Event [Member] \| Southern California Gas Company [Member] \| Bonds [Member] \| First Mortgage Bonds, Due June 2050 [Member]
Debt Instrument [Line Items]
Debt amount			$ 650,000,000
Proceeds from Debt, Net of Issuance Costs			643,000,000
Debt Issuance Costs, Gross			$ 7,000,000
On Or After October 1, 2024 [Member] \| Junior Subordinated Debt [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage					100.00%
Before October 1, 2024, Amended Tax Regulations [Member] \| Junior Subordinated Debt [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage					100.00%
Before October 1, 2024, Equity Credit Methodology Update [Member] \| Junior Subordinated Debt [Member] \| Junior Subordinated Notes Due 2079 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage					102.00%