Asset Impairment Charges, Net of Taxes and Noncontrolling Interests

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Assets, Measurement Input

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

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Equity Method Investment Other Than Temporary Impairment Net Of Tax Benefit

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Fair Value Inputs, Percentage of Fair Value Measurement

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Fair Value Inputs, Range of Inputs

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Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, On Equity Method Investment, Net of Tax

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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No definition available.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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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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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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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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No definition available.

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Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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The cash inflow associated with the sale of 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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FAIR VALUE MEASUREMENTS - NONRECURRING FAIR VALUE MEASURES (Details)			1 Months Ended				3 Months Ended		9 Months Ended	12 Months Ended
	Jun. 25, 2018 USD ($)	Sep. 26, 2016 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	May 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Feb. 07, 2019 USD ($)	Feb. 06, 2019 USD ($)	Jan. 01, 2019 USD ($)	Sep. 26, 2018	Sep. 29, 2016 USD ($)	May 09, 2016	Mar. 29, 2016 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Remeasurement of equity method investment										$ 0	$ 0	$ 617,000,000
Equity method investment			$ 9,652,000,000							9,652,000,000	$ 0
Valuation, Market Approach [Member] \| Non-utility Natural gas Storage Assets [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investment			$ 337,000,000							$ 337,000,000
% of fair value measurement			100.00%							100.00%
Range of inputs			100.00%							100.00%
Valuation, Market Approach [Member] \| Non-utility Natural gas Storage Assets [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of inputs	10.00%
Valuation, Market Approach [Member] \| IEnova Pipelines [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership percentage in equity method investee																100.00%
Fair value of investment		$ 1,144,000,000
% of fair value measurement		100.00%
Range of inputs		100.00%
Valuation, Market Approach [Member] \| TdM [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investment							$ 62,000,000										$ 145,000,000
% of fair value measurement							100.00%										100.00%
Range of inputs							100.00%										100.00%
Valuation, Market Approach [Member] \| Rockies Express [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investment																			$ 440,000,000
% of fair value measurement																			100.00%
Range of inputs																			100.00%
Valuation Technique, Discounted Cash Flow [Member] \| Non-utility Natural gas Storage Assets [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investment	$ 190,000,000
% of fair value measurement	100.00%
Valuation Technique, Discounted Cash Flow [Member] \| Certain U.S. Wind Equity Method Investments [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of investment	$ 145,000,000
% of fair value measurement	100.00%
Sempra Mexico [Member] \| IEnova Pipelines [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquired percentage interest		50.00%
Ownership percentage in equity method investee		100.00%
Remeasurement of equity method investment		$ 617,000,000
Gain on acquisition of remaining voting rights, net of tax		432,000,000
Fair value of investment		1,144,000,000
Equity method investment		520,000,000
Reclassification adjustment from AOCI		(7,000,000)
Fair value of business combination		$ 2,288,000,000
Sempra Mexico [Member] \| TdM [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than temporary impairment in investment							$ 71,000,000	$ 131,000,000
Other than temporary impairment in investment, net of tax								$ 111,000,000
Sempra Renewables [Member] \| Wind Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investment			$ 291,000,000							$ 291,000,000
Other than temporary impairment										200,000,000
Sempra Renewables [Member] \| Wind Investments [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investment			139,000,000							139,000,000
Sempra LNG & Midstream [Member] \| Rockies Express [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than temporary impairment in investment						$ 44,000,000			$ 44,000,000
Other than temporary impairment in investment, net of tax						$ 27,000,000			$ 27,000,000
Ownership percentage in equity method investee					25.00%	25.00%												25.00%	25.00%
Fair value of investment						$ 440,000,000
Equity method investment						484,000,000
Proceeds from sale of investments					$ 443,000,000	$ 440,000,000
Disposal Group Held-for-sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges, net of taxes and noncontrolling interests				$ (900,000,000)
Assets, fair value disclosure	$ 145,000,000
Asset impairment charges				(1,500,000,000)
Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges, net of taxes and noncontrolling interests				(145,000,000)
Asset impairment charges				(200,000,000)
Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member] \| Wind Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than temporary impairment										200,000,000
Asset impairment charges, net of taxes and noncontrolling interests										(145,000,000)
Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges, net of taxes and noncontrolling interests			126,000,000	(755,000,000)						(629,000,000)
Asset impairment charges			183,000,000	$ (1,300,000,000)						(1,100,000,000)
Proceeds from sale			5,000,000							5,000,000
Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges, net of taxes and noncontrolling interests	(755,000,000)
Asset impairment charges	$ (1,300,000,000)
Assets held for sale			336,000,000							336,000,000
Bay Gas [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest	90.90%
LA Storage [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership interest	75.40%
Sempra LNG & Midstream [Member] \| Disposal Group Disposed of by Sale [Member] \| Mississippi Hub And Bay Gas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale			323,000,000							323,000,000
Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale			$ 337,000,000							$ 337,000,000
Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure	$ 190,000,000
Subsequent Event [Member] \| Sempra LNG & Midstream [Member] \| Bay Gas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ownership percentage in equity method investee														9.10%
Equity method investment														$ 20,000,000
Subsequent Event [Member] \| Sempra LNG & Midstream [Member] \| Disposal Group Disposed of by Sale [Member] \| Mississippi Hub And Bay Gas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Proceeds from sale													$ 328,000,000		$ 332,000,000
Measurement Input, Commodity Market Price [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member] \| Wind Generation Projects [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, measurement input	29
Measurement Input, Commodity Market Price [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member] \| Wind Generation Projects [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, measurement input	92
Measurement Input, Storage Rate [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, measurement input	0.06
Measurement Input, Storage Rate [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, measurement input	0.22
Measurement Input, Discount Rate [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member] \| Wind Generation Projects [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of inputs	8.00%
Measurement Input, Discount Rate [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member] \| Wind Generation Projects [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of inputs	10.00%
Measurement Input, Discount Rate [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra Renewables [Member] \| Wind Generation Projects [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of inputs	8.70%
Measurement Input, Discount Rate [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member] \| Disposal Group Held-for-sale [Member] \| Sempra LNG & Midstream [Member] \| Non-utility Natural gas Storage Assets [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range of inputs	10.00%