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DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE NOTIONALS (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Interest rate and foreign exchange instruments [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative | $ 306 | $ 306
Foreign Exchange [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative | 1,084 | 1,158
Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative | 1,430 | 594
San Diego Gas and Electric Company [Member] | Interest Rate Swap maturing on October 31 2019 [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative | 159 |
San Diego Gas and Electric Company [Member] | Swaption [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative | 142 |
San Diego Gas and Electric Company [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Notional amount of derivative | $ 142 | $ 142
Maximum [Member] | Interest rate and foreign exchange instruments [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2023 | Dec. 31, 2023
Maximum [Member] | Foreign Exchange [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2020 | Dec. 31, 2020
Maximum [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2032 | Dec. 31, 2032
Maximum [Member] | San Diego Gas and Electric Company [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2019 | Dec. 31, 2019
Minimum [Member] | Interest rate and foreign exchange instruments [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2019 | Dec. 31, 2019
Minimum [Member] | Foreign Exchange [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2019 | Dec. 31, 2019
Minimum [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2019 | Dec. 31, 2019
Minimum [Member] | San Diego Gas and Electric Company [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, Maturity Date | Dec. 31, 2019 | Dec. 31, 2019

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- Definition Nominal or face amount used to calculate payments on the derivative liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
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