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Equity Method Investment, Realized Gain (Loss) on Acquisition of Remaining Voting Rights, Net of Tax

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Power Plant, Energy Generating Capacity

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

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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- Definition

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

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No definition available.

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- Definition

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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Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "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 cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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The cash inflow from a borrowing supported by a written promise to pay an obligation.

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The total amount of operating revenues recognized during the period.

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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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ACQUISITION AND DIVESTITURE ACTIVITY - RECENT BUSINESS ACQUISITIONS (Details) MXN in Millions, $ in Millions						1 Months Ended		3 Months Ended			9 Months Ended
	Oct. 13, 2016 USD ($) MXN / $	Oct. 13, 2016 MXN MXN / $	Sep. 26, 2016 USD ($)	Sep. 05, 2016 USD ($) MW	Jul. 01, 2016 USD ($)	Jul. 31, 2016 USD ($) MW	Mar. 31, 2015 USD ($) MW	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 25, 2016
Business Acquisition [Line Items]
Total purchase price net of cash acquired											$ (1,096)	$ (3)
Acquisition related costs									$ 2	$ 1	2	1
Revenues									2,535	2,481	7,313	7,530
Earnings (losses)									622	$ 248	991	$ 980
Sempra Mexico [Member] \| GdC [Member]
Business Acquisition [Line Items]
Cash consideration			$ 1,144
Cash acquired			66
Revenues									3		3
Earnings (losses)									(1)		(1)
Accounts payable acquired			11
Long-term debt assumed			$ 315
Sempra Mexico [Member] \| Ventika [Member]
Business Acquisition [Line Items]
Ownership percentage acquired				100.00%
Power generating capacity \| MW				252
Purchase price				$ 852
Long-term debt assumed				$ 477
Sempra Mexico [Member] \| IEnova [Member] \| GdC [Member]
Business Acquisition [Line Items]
Ownership percentage acquired			50.00%
Total purchase price net of cash acquired			$ 1,078
Ownership percentage after acquisition			100.00%
Ownership percentage before acquisition													50.00%
Cash consideration			$ 1,144
Cash acquired			66
Debt assumed			364
Proceeds from Notes Payable			$ 1,150
Pretax gain for the excess of acquisition date fair value over carrying value									617		617
After-tax gain for the excess of acquisition date fair value over carrying value									432		432
Long-term debt assumed									$ 364		$ 364
Sempra Mexico [Member] \| IEnova [Member] \| Ramones Norte Pipeline [Member]
Business Acquisition [Line Items]
Ownership percentage			25.00%
Sempra Mexico [Member] \| IEnova [Member] \| DEN [Member]
Business Acquisition [Line Items]
Ownership percentage after acquisition			50.00%
Sempra Renewables [Member] \| Black Oak Getty Wind [Member]
Business Acquisition [Line Items]
Ownership percentage after acquisition							100.00%
Power generating capacity \| MW							78
Power purchase agreement term							20 years
Purchase price							$ 8
Sempra Renewables [Member] \| Apple Blossom Wind [Member]
Business Acquisition [Line Items]
Ownership percentage after acquisition						100.00%
Cash consideration					$ 18	$ 22
Power generating capacity \| MW						100
Power purchase agreement term						15 years
Sempra Renewables [Member] \| Apple Blossom Wind [Member] \| Forecast [Member]
Business Acquisition [Line Items]
Cash consideration								$ 4
Subsequent Event [Member] \| IEnova [Member]
Business Acquisition [Line Items]
Cash consideration	$ 351
Proceeds from follow-on share offering	$ 1,570	MXN 29,860
Exchange rate \| MXN / $	18.96	18.96
Subsequent Event [Member] \| Sempra Mexico [Member] \| IEnova [Member] \| GdC [Member]
Business Acquisition [Line Items]
Proceeds from follow-on share offering	$ 1,570	MXN 29,860
Exchange rate \| MXN / $	18.96	18.96