XML 12 R39.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Price Risk Management Price Risk Management assets and liabilities subject to master netting agreements (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Electricity [Member] | Energy Related Derivative [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | $ 91 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember | $ 55 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember
Electricity [Member] | Gross amounts offset [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = por_GrossAmountsOffsetMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = por_GrossAmountsOffsetMember
Electricity [Member] | net amount presented [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 91 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember | 55 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember
Electricity [Member] | Derivative [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 91 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember | 55 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember
Electricity [Member] | Securities Pledged as Collateral [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_SecuritiesPledgedAsCollateralMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_SecuritiesPledgedAsCollateralMember
Electricity [Member] | Commodity Contract [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember
Natural Gas [Member] | Energy Related Derivative [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 16 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember | 17 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember
Natural Gas [Member] | Gross amounts offset [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = por_GrossAmountsOffsetMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = por_GrossAmountsOffsetMember
Natural Gas [Member] | net amount presented [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 16 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember | 17 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember
Natural Gas [Member] | Derivative [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 16 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember | 17 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember
Natural Gas [Member] | Securities Pledged as Collateral [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_SecuritiesPledgedAsCollateralMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_SecuritiesPledgedAsCollateralMember
Natural Gas [Member] | Commodity Contract [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember
Liabilities, Total [Member] | Energy Related Derivative [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 107 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember | 72 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember
Liabilities, Total [Member] | Gross amounts offset [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = por_GrossAmountsOffsetMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = por_GrossAmountsOffsetMember
Liabilities, Total [Member] | net amount presented [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 107 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember | 72 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember
Liabilities, Total [Member] | Derivative [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 107 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember | 72 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember
Liabilities, Total [Member] | Securities Pledged as Collateral [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_SecuritiesPledgedAsCollateralMember | 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_SecuritiesPledgedAsCollateralMember
Liabilities, Total [Member] | Commodity Contract [Member] |  |
Price Risk Management assets and liabilities subject to master netting agreements [Line Items] |  |
Derivative Liability, Fair Value, Net | $ 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember | $ 0 us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_CommodityContractMember

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