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DEBT AND CREDIT FACILITIES - LINES OF CREDIT (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 11, 2019 USD ($) | Feb. 28, 2019 USD ($) lender | Dec. 31, 2018 USD ($) lender | Mar. 31, 2019 USD ($)
Line of Credit Facility [Line Items] |  |  |  |
Standby letters of credit outstanding |  |  |  | $ 611,000,000
Sempra U.S. Businesses [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 5,435,000,000
Available unused credit |  |  |  | $ 3,718,000,000
Maximum ratio of indebtedness to total capitalization |  |  |  | 65.00%
Sempra Energy [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 1,250,000,000
Available unused credit |  |  |  | 1,250,000,000
Capacity for issuance of letters of credit |  |  |  | 400,000,000
Sempra Global [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 3,185,000,000
Available unused credit |  |  |  | 1,896,000,000
California Utilities Combined [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 1,000,000,000
Limit on facility borrowings |  |  |  | (500,000,000)
Available unused credit |  |  |  | 572,000,000
Limit on borrowings available |  |  |  | (500,000,000)
Capacity for issuance of letters of credit |  |  |  | 250,000,000
San Diego Gas and Electric Company [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 750,000,000
Available unused credit |  |  |  | $ 512,000,000
Maximum ratio of indebtedness to total capitalization |  |  |  | 65.00%
Southern California Gas Company [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 750,000,000
Available unused credit |  |  |  | $ 560,000,000
Maximum ratio of indebtedness to total capitalization |  |  |  | 65.00%
Sempra Mexico [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity |  | $ 1,500,000,000 | $ 1,170,000,000 |
Available unused credit |  |  |  | $ 692,000,000
Term of debt instrument |  | 5 years |  |
Number of lenders | lender |  | 10 | 8 |
Commercial Paper [Member] | Sempra U.S. Businesses [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding |  |  |  | (1,717,000,000)
Commercial Paper [Member] | Sempra Energy [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding |  |  |  | 0
Commercial Paper [Member] | Sempra Global [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding |  |  |  | (1,289,000,000)
Unamortized debt discount |  |  |  | 2,000,000
Commercial Paper [Member] | California Utilities Combined [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding |  |  |  | (428,000,000)
Limit on facility borrowings |  |  |  | 0
Commercial Paper [Member] | San Diego Gas and Electric Company [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding |  |  |  | (238,000,000)
Commercial Paper [Member] | Southern California Gas Company [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Amount outstanding |  |  |  | $ (190,000,000)
Subsequent Event [Member] | Sempra Mexico [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity | $ 100,000,000 |  |  |
Term of debt instrument | 3 years |  |  |

X
- Definition Committed lines of credit, capacity for issuance of letters of credit. + References No definition available. + Details
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- Definition Committed lines of credit, maximum ratio of indebtedness to total capitalization. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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