XML 113 R66.htm IDEA: XBRL DOCUMENT v2.4.1.9
Derivative Instruments (Additional Disclosures) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Collateral provided to counterparties:      
Reflected in margin and collateral deposits $ 36us-gaap_DerivativeCollateralRightToReclaimCash $ 19us-gaap_DerivativeCollateralRightToReclaimCash  
Southern California Edison | Gross amounts recognized      
Derivatives      
Realized losses (57)eix_RealizedGainsLossesOnEconomicHedgingActivities
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
(56)eix_RealizedGainsLossesOnEconomicHedgingActivities
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
(227)eix_RealizedGainsLossesOnEconomicHedgingActivities
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
Unrealized gains (losses) (147)us-gaap_UnrealizedGainLossOnDerivatives
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
93us-gaap_UnrealizedGainLossOnDerivatives
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
125us-gaap_UnrealizedGainLossOnDerivatives
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
Southern California Edison | Electric Utility | Gross amounts recognized      
Derivatives      
Aggregate fair value of all derivative liabilities with credit-risk-related contingent features 53us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
/ us-gaap_StatementBusinessSegmentsAxis
= eix_ElectricUtilityMember
49us-gaap_DerivativeNetLiabilityPositionAggregateFairValue
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
/ us-gaap_StatementBusinessSegmentsAxis
= eix_ElectricUtilityMember
 
Potential additional collateral 40us-gaap_AdditionalCollateralAggregateFairValue
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
/ us-gaap_StatementBusinessSegmentsAxis
= eix_ElectricUtilityMember
   
Payables | Southern California Edison | Electric Utility | Gross amounts recognized      
Derivatives      
Potential additional collateral 25us-gaap_AdditionalCollateralAggregateFairValue
/ eix_DerivativeInstrumentsByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis
= eix_PayablesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
/ us-gaap_StatementBusinessSegmentsAxis
= eix_ElectricUtilityMember
   
Gross amounts recognized | Southern California Edison | Electric Utility      
Derivatives      
Collateral already posted, fair value $ 13us-gaap_CollateralAlreadyPostedAggregateFairValue
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
/ us-gaap_StatementBusinessSegmentsAxis
= eix_ElectricUtilityMember
$ 0us-gaap_CollateralAlreadyPostedAggregateFairValue
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= eix_EconomicHedgesMember
/ dei_LegalEntityAxis
= eix_SouthernCaliforniaEdisonCompanyMember
/ us-gaap_StatementBusinessSegmentsAxis
= eix_ElectricUtilityMember