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DEBT AND CREDIT FACILITIES 4 (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Schedule Of Long Term Debt Maturities [Line Items]  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 456us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths [1]
Long-term Debt, Maturities, Repayments of Principal in Year Two 863us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo [1]
Long-term Debt, Maturities, Repayments of Principal in Year Three 680us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree [1]
Long-term Debt, Maturities, Repayments of Principal in Year Four 1,059us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour [1]
Long-term Debt, Maturities, Repayments of Principal in Year Five 822us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive [1]
Long-term Debt, Maturities, Repayments of Principal after Year Five 8,467us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive [1]
Long-term Debt Maturities, Total Repayments Of Principal 12,347sre_LongTermDebtMaturitiesTotalRepaymentsOfPrincipal [1]
Schedule Of Long-term Debt Maturities, S D G E [Member]  
Schedule Of Long Term Debt Maturities [Line Items]  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 360us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Two 10us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Three 10us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Four 171us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Five 285us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Long-term Debt, Maturities, Repayments of Principal after Year Five 3,625us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Long-term Debt Maturities, Total Repayments Of Principal 4,461sre_LongTermDebtMaturitiesTotalRepaymentsOfPrincipal
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSDGEMember		 [1]
Schedule Of Long-term Debt Maturities, So Cal Gas [Member]  
Schedule Of Long Term Debt Maturities [Line Items]  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Two 8us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Three 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Four 250us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Five 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Long-term Debt, Maturities, Repayments of Principal after Year Five 1,655us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Long-term Debt Maturities, Total Repayments Of Principal 1,913sre_LongTermDebtMaturitiesTotalRepaymentsOfPrincipal
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesSoCalGasMember		 [1]
Schedule Of Long-term Debt Maturities, Other Sempra Energy [Member]  
Schedule Of Long Term Debt Maturities [Line Items]  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 96us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Two 845us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Three 670us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Four 638us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
Long-term Debt, Maturities, Repayments of Principal in Year Five 537us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
Long-term Debt, Maturities, Repayments of Principal after Year Five 3,187us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
Long-term Debt Maturities, Total Repayments Of Principal $ 5,973sre_LongTermDebtMaturitiesTotalRepaymentsOfPrincipal
/ sre_ScheduleOfLongTermDebtMaturitiesBorrowerAxis
= sre_ScheduleOfLongTermDebtMaturitiesOtherSempraEnergyMember		 [1]
[1]
Excludes capital lease obligations, build-to-suit lease and market value adjustments for interest rate swaps.