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OTHER FINANCIAL DATA - REVENUES DISCLOSURE (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Revenues Disclosure [Abstract]      
Natural gas revenues $ 4,549us-gaap_RegulatedOperatingRevenueGas [1] $ 4,398us-gaap_RegulatedOperatingRevenueGas [1] $ 3,873us-gaap_RegulatedOperatingRevenueGas [1]
Electric revenues 5,209sre_RegulatedOperatingRevenueElectric [1] 4,911sre_RegulatedOperatingRevenueElectric [1] 4,568sre_RegulatedOperatingRevenueElectric [1]
Total Utilities Revenues at Sempra Energy Consolidated $ 9,758us-gaap_RegulatedOperatingRevenue $ 9,309us-gaap_RegulatedOperatingRevenue $ 8,441us-gaap_RegulatedOperatingRevenue
[1]
Excludes intercompany revenues.