COMMITMENTS AND CONTINGENCIES - CONTRACTUAL COMMITMENTS (Details) - Sempra LNG [Member] - Liquefied Natural Gas Contracts [Member] $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
Increase (decrease) in commitment amount, 2019	$ (96)
Increase (decrease) in commitment amount, 2020	19
Increase (decrease) in commitment amount, 2021	8
Increase (decrease) in commitment amount, 2022	3
Increase (decrease) in commitment amount, 2023	2
Increase (decrease) in commitment amount, thereafter	$ 52

Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, After Five Years

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- Definition

Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Remainder of Fiscal Year

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- Definition

Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Five

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- Definition

Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Four

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- Definition

Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Three

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- Definition

Increase (Decrease) in Unrecorded Unconditional Purchase Obligation, Year Two

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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.

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