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Price Risk Management Counterparties Representing 10% or More (Details) | Jun. 30, 2011 | Dec. 31, 2010
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Assets from price risk management activities: |  |
Counterparty A | 24.00% | 22.00%
Counterparty B | 13.00% | 11.00%
Counterparty C | 12.00% | 23.00%
Counterparty D | 10.00% | 1.00%
Counterparty E | 0.00% | 10.00%
Concentration of Risk, Derivative Instruments, Assets | 59.00% | 67.00%
Liabilities from price risk management activities: |  |
Counterparty C | 25.00% | 24.00%
Counterparty F | 10.00% | 9.00%
Counterparty G | 9.00% | 12.00%
Concentration of Risk, Derivative Instruments, Liabilities | 44.00% | 45.00%

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- Definition Represents aggregate of individually significant counterparties of total assets arising from derivative instruments from price risk management activities. + Details
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- Definition Represents aggregate of individually significant counterparties of total liabilities arising from derivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total assets arising from derivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total assets arising from derivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total assets arising from derivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total liabilities arising from derivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total assets arising from dreivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total assets arising from derivative instruments from price risk management activities. + Details
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- Definition Individually significant counterparty of total liabilities arising from derivative instruments from price risk management activities. + Details
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