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Number of Primary Lines of Credit

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The increase during the period in capital lease obligations due to entering into new capital leases.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of unamortized debt discount (premium) and debt issuance 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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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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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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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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 during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash inflow from amounts received from a long-term debt instrument secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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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)	Sep. 24, 2018 USD ($)	May 17, 2018 USD ($)	May 15, 2018 USD ($)	Jan. 12, 2018 USD ($)	Dec. 31, 2018 USD ($) line_of_credit	Jan. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) line_of_credit	Dec. 31, 2017 USD ($)	Dec. 13, 2018 USD ($)	Oct. 31, 2018 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding					$ 598,000,000		$ 598,000,000
Unsecured debt					12,900,000,000		12,900,000,000
Callable long-term debt, not subject to make-whole provisions					976,000,000		976,000,000
Repayments of debt				$ 800,000,000		$ 800,000,000
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] \| Fixed and Variable Rate Notes [Member]
Debt Instrument [Line Items]
Gross long-term debt						4,900,000,000
Unamortized debt discount (premium) and debt issuance costs						$ 68,000,000
Sempra U.S. Businesses [Member]
Debt Instrument [Line Items]
Total facility					5,435,000,000		5,435,000,000
Available unused credit					$ 4,219,000,000		$ 4,219,000,000
Sempra Energy Consolidated [Member]
Debt Instrument [Line Items]
Number of lines of credit \| line_of_credit					3		3
Weighted average interest rate on total short-term debt outstanding					3.01%		3.01%	1.92%
South American Utilities and Mexico Combined [Member]
Debt Instrument [Line Items]
Total facility					$ 1,819,000,000		$ 1,819,000,000
Available unused credit					829,000,000		829,000,000
Line of credit					990,000,000		990,000,000
Southern California Gas Company [Member]
Debt Instrument [Line Items]
Total facility					750,000,000		750,000,000
Available unused credit					$ 453,000,000		$ 453,000,000
Weighted average interest rate on total short-term debt outstanding					2.58%		2.58%	1.64%
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					1,200,000,000		1,200,000,000
Gross long-term debt					3,450,000,000		3,450,000,000	$ 3,000,000,000
Otay Mesa Energy Center [Member]
Debt Instrument [Line Items]
Callable long-term debt, not subject to make-whole provisions					220,000,000		220,000,000
OMEC LLC [Member] \| Secured Debt [Member] \| December 2018 OMEC Loan Agreement [Member]
Debt Instrument [Line Items]
Debt amount					$ 220,000,000		220,000,000
OMEC LLC [Member] \| Secured Debt [Member] \| December 2018 OMEC Loan Agreement [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Variable percentage rate					2.00%
San Diego Gas and Electric Company [Member]
Debt Instrument [Line Items]
Total facility					$ 750,000,000		750,000,000
Available unused credit					$ 453,000,000		$ 453,000,000
Weighted average interest rate on total short-term debt outstanding					2.97%		2.97%	1.65%
Unsecured debt					$ 0		$ 0
Callable long-term debt, not subject to make-whole provisions					251,000,000		251,000,000
First mortgage bonds available for future issuance					5,700,000,000		5,700,000,000
Gross long-term debt					4,776,000,000		4,776,000,000	$ 4,573,000,000
San Diego Gas and Electric Company [Member] \| Four Point One Five Percent First Mortgage Bonds Maturing Twenty Forty Eight [Member]
Debt Instrument [Line Items]
Proceeds from issuance of first mortgage bond		$ 400,000,000
Stated percentage rate		4.15%
Southern California Gas Company [Member] \| Four Point One Two Five Percent First Mortgage Bonds Maturing Twenty Forty Eight [Member]
Debt Instrument [Line Items]
Proceeds from issuance of first mortgage bond			$ 400,000,000
Stated percentage rate			4.125%
Southern California Gas Company [Member] \| Four Point Three Percent First Mortgage Bonds Maturing Twenty Forty Nine [Member]
Debt Instrument [Line Items]
Proceeds from issuance of first mortgage bond	$ 550,000,000
Stated percentage rate	4.30%
Sempra South American Utilities [Member] \| Luz Del Sur [Member]
Debt Instrument [Line Items]
Proceeds from issuance of debt							107,000,000
Line of credit					$ 61,000,000		$ 61,000,000
Sempra South American Utilities [Member] \| Luz Del Sur [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Stated percentage rate					4.30%		4.30%
Sempra South American Utilities [Member] \| Luz Del Sur [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Stated percentage rate					5.70%		5.70%
Sempra South American Utilities [Member] \| Luz Del Sur [Member] \| Corporate Debt Securities [Member] \| Corporate Bonds Maturing 2028 [Member]
Debt Instrument [Line Items]
Stated percentage rate										7.00%
Debt amount										$ 50,000,000
Interest Rate Swap, maturing on April 30, 2019 [Member] \| OMEC LLC [Member]
Debt Instrument [Line Items]
Notional amount of derivative liability					$ 142,000,000		$ 142,000,000
Fixed percentage interest rate					5.2925%		5.2925%
Interest Rate Swap, maturing on October 31, 2019 [Member] \| OMEC LLC [Member]
Debt Instrument [Line Items]
Notional amount of derivative liability					$ 159,000,000		$ 159,000,000
Fixed percentage interest rate					2.765%		2.765%
Swaption [Member] \| OMEC LLC [Member]
Debt Instrument [Line Items]
Notional amount of derivative liability					$ 142,000,000		$ 142,000,000
Fixed percentage interest rate					3.0375%		3.0375%
Peaker Plant Facility [Member] \| San Diego Gas and Electric Company [Member]
Debt Instrument [Line Items]
Power purchase agreement term								20 years
Capital lease obligations incurred					$ 550,000,000
Certain Subsidiaries Of Sempra Renewables [Member] \| Disposal Group Disposed of by Sale [Member]
Debt Instrument [Line Items]
Proceeds from sale									$ 1,600,000,000
Long-term debt									$ 70,000,000