The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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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 current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Amount of interest capitalized during the period.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Feb. 28, 2017	Sep. 30, 2017	Sep. 30, 2016	May 31, 2016	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
Equitization of note receivable due from unconsolidated affiliate		$ 19	$ 0
Maximum exposure under guarantor obligations		4,500
Aggregate carrying value of guarantor obligations		41
Sempra LNG & Midstream [Member] \| Rockies Express [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage sold				25.00%	25.00%
Joint Venture [Member] \| Sempra South American Utilities [Member] \| Eletrans [Member]
Schedule of Equity Method Investments [Line Items]
Equitization of note receivable due from unconsolidated affiliate	$ 19
Investments made during period		1
Joint Venture [Member] \| Sempra Mexico [Member] \| IMG [Member]
Schedule of Equity Method Investments [Line Items]
Investments made during period		72	56
Joint Venture [Member] \| Sempra Renewables [Member]
Schedule of Equity Method Investments [Line Items]
Investments made during period			18
Joint Venture [Member] \| Sempra LNG & Midstream [Member] \| Cameron LNG [Member]
Schedule of Equity Method Investments [Line Items]
Investments made during period		1
Capitalized interest		36	$ 36
IEnova [Member] \| Joint Venture [Member] \| Sempra Mexico [Member] \| IMG [Member]
Schedule of Equity Method Investments [Line Items]
Maximum exposure under guarantor obligations		$ 288
Percent ownership held by noncontrolling interests		40.00%
TransCanada [Member] \| IEnova [Member] \| Joint Venture [Member] \| Sempra Mexico [Member] \| IMG [Member]
Schedule of Equity Method Investments [Line Items]
Percent ownership held by noncontrolling interests		60.00%