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DEBT AND CREDIT FACILITIES 7 (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
San Diego Gas and Electric Company [Member]  
First Mortgage Bonds [Line Items]  
First Mortgage Bonds, Amount Available For Future Issuance $ 4,300sre_FirstMortgageBondsAmountAvailableForFutureIssuance
/ dei_LegalEntityAxis
= sre_SanDiegoGasAndElectricCompanyMember
Southern California Gas Company [Member]  
First Mortgage Bonds [Line Items]  
First Mortgage Bonds, Amount Available For Future Issuance $ 9sre_FirstMortgageBondsAmountAvailableForFutureIssuance
/ dei_LegalEntityAxis
= sre_SouthernCaliforniaGasCompanyMember