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v3.19.1

DERIVATIVE FINANCIAL INSTRUMENTS - DERIVATIVE COMMODITY VOLUMES (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 MWh MMBTU | Dec. 31, 2018 MWh MMBTU
Natural Gas Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount | MMBTU | 33 | 35
Electric Energy Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount | 2 | 2
Congestion Revenue Rights Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount | 50 | 52
SDG&E [Member] | Natural Gas Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount | MMBTU | 32 | 33
SDG&E [Member] | Electric Energy Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount | 2 | 2
SDG&E [Member] | Congestion Revenue Rights Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount | 50 | 52

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