XML 104 R63.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 | Dec. 31, 2014 | Dec. 31, 2013
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Electricity [Member] | Energy Related Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | $ (55)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember | $ (91)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember
Electricity [Member] | Gross amounts offset [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (55)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember | (91)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember
Electricity [Member] | Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (55)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember | (91)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = por_ElectricityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember
Electricity [Member] | Securities Pledged as Collateral [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (17)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember | (1)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember
Natural Gas [Member] | Gross amounts offset [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (17)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember | (1)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember
Natural Gas [Member] | Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (17)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember | (1)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_NaturalGasReservesMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember
Natural Gas [Member] | Securities Pledged as Collateral [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (72)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember | (92)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EnergyRelatedDerivativeMember
Liabilities, Total [Member] | Gross amounts offset [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (72)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember | (92)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = por_NetAmountPresentedMember
Liabilities, Total [Member] | Derivative [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (72)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember | (92)us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral / por_CommodityAxis = us-gaap_LiabilitiesTotalMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_DerivativeMember
Liabilities, Total [Member] | Securities Pledged as Collateral [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 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] |  |
Derivative [Line Items] |  |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | $ 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

X
- Definition Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226006-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41678-113959 + Details
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