INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Sodigas [Member]
Schedule of Equity Method Investments [Line Items]
Sempra Renewables' Equity Method Investments In Joint Ventures	$ 5	$ 50
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
Equity Method Investment, Cumulative Foreign Currency Translation Adjustments	270
Equity Method Investment, Deferred Tax Asset			80
Equity Method Investment, Remaining Carrying Value			$ 20

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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