INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Investment In Joint Venture Disclosure [Abstract]
Investment in RBS Sempra Commodities LLP	$ 73
Pretax equity earnings (losses) from RBS Sempra Commodities LLP	0	0
Schedule of Equity Method Investments [Line Items]
Sempra Renewables' Equity Method Investments In Joint Ventures	51	5
Future ownership percentage of ConEdison	50.00%
Future ownership percentage of Renewables	50.00%
Equity Method Investments Upon Deconsolidation	(39)
Sodigas [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage in equity method investee		43.00%
Equity Method Investment, Other than Temporary Impairment		10
Equity Method Investment Other Than Temporary Impairment After Tax		$ 7

Pretax equity earnings (losses) from RBS Sempra Commodities LLP.

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Equity method investment other than temporary impairment, after tax.

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Equity method investment ownership percentage in future.

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Equity method investment ownership percentage of partner in future.

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Equity method investments recorded upon deconsolidation.

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Investment in RBS Sempra Commodities LLP.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 32

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

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