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INVESTMENTS IN UNCONSOLIDATED ENTITIES (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Copper Mountain Solar 3 [Member]
Jun. 30, 2014
Solar Projects [Member]
Mar. 31, 2013
Sodigas Sur [Member]
Mar. 31, 2013
Sodigas Pampeana [Member]
Jun. 30, 2014
ConEdison [Member]
Mar. 31, 2013
Sodigas [Member]
Investment In Joint Venture Disclosure [Abstract]                    
Distributions from RBS Sempra Commodities LLP   $ 50                
Investment in RBS Sempra Commodities LLP 73   73              
Equity earnings (losses) related to RBS Commodities 0 0 0 0            
Schedule of Equity Method Investments [Line Items]                    
Sempra Renewables' Equity investments In Joint Ventures         45 109        
Equity Method Investment, Other than Temporary Impairment                   10
Equity Method Investment Other Than Temporary Impairment After Tax                   7
Ownership percentage in equity method investee           50.00% 43.00% 43.00% 50.00%  
Pretax loss on sale of Argentina   (7)                
Aftertax loss on sale of Argentina   (4)                
Proceeds from sale of Argentina   $ 13