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Equity method investment summarized financial information operating expense

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of current assets reported by an equity method investment of the entity.

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The amount of current liabilities reported by an equity method investment of the entity.

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Amount of income (loss) from continuing operations reported by an equity method investee.

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The amount of net income (loss) reported by an equity method investment of the entity.

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The amount of noncurrent assets reported by an equity method investment of the entity.

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The amount of noncurrent liabilities reported by an equity method investment of the entity.

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- Definition

The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

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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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Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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INVESTMENTS IN UNCONSOLIDATED ENTITIES - SUMMARIZED FINANCIAL INFORMATION (Details) - USD ($) $ in Millions			12 Months Ended
	Nov. 15, 2017	Sep. 26, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 14, 2017	Sep. 25, 2016	May 31, 2016	May 09, 2016	Mar. 31, 2016	Mar. 29, 2016
Equity Method Investment, Summarized Financial Information [Abstract]
Gross revenue			$ 846	$ 1,079	$ 1,533
Operating expense			(590)	(726)	(845)
Income from operations			256	353	688
Interest expense			(217)	(127)	(312)
Net income/earnings			116	252	$ 440
Current assets			974	704
Noncurrent assets			14,087	9,970
Current liabilities			797	629
Noncurrent liabilities			$ 9,809	$ 6,627
Sempra LNG & Midstream [Member] \| Rockies Express [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee								25.00%	25.00%	25.00%	25.00%
IEnova [Member] \| Ductos Energéticos del Norte [Member] \| Sempra Mexico [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage before acquisition	100.00%					50.00%
Acquired percentage interest	50.00%
Ownership percentage in consolidated entity	100.00%
Ownership percentage in equity method investee						50.00%
IEnova [Member] \| IEnova Pipelines [Member] \| Sempra Mexico [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage before acquisition							50.00%
Acquired percentage interest		50.00%
Ownership percentage in consolidated entity		100.00%