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Price Risk Management Counterparties Representing 10% or More (Details) | Sep. 30, 2015 | Dec. 31, 2014
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Assets from price risk management activities: |  |
Counterparty A | 65.00% | 63.00%
Counterparty B | 8.00% | 14.00%
Total | 73.00% | 77.00%
Liabilities from price risk management activities: |  |
Counterparty C | 39.00% | 22.00%
Counterparty D | 6.00% | 12.00%
Total | 45.00% | 34.00%

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- Definition Assets from price risk management activities: [Abstract] + References No definition available. + Details
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- Definition Represents aggregate of individually significant counterparties of total assets arising from derivative instruments from price risk management activities. + References No definition available. + Details
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- Definition Represents aggregate of individually significant counterparties of total liabilities arising from derivative instruments from price risk management activities. + References No definition available. + Details
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Namespace Prefix: | por_
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- Definition Individually significant counterparty of total assets arising from derivative instruments from price risk management activities. + References No definition available. + Details
Name: | por_CounterpartyA
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- Definition Individually significant counterparty of total assets arising from derivative instruments from price risk management activities. + References No definition available. + Details
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- Definition Counterparty D for PRM Liab + References No definition available. + Details
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- Definition Counterparty E For PRM Liab + References No definition available. + Details
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- Definition Liabilities from price risk management activities: [Abstract] + References No definition available. + Details
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