v2.4.1.9
Use of Collateral (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Use of Collateral [Abstract]    
Margin deposits $ 107us-gaap_MarginDepositAssets [1] $ 96us-gaap_MarginDepositAssets [1]
Natural gas and power prepayments 21cpn_NaturalGasAndPowerPrepayments 22cpn_NaturalGasAndPowerPrepayments
Total margin deposits and natural gas and power prepayments with our counterparties 128cpn_DerivativeCollateralRightToReclaimCashAndNaturalGasAndPowerPrepaymentsTotal [2] 118cpn_DerivativeCollateralRightToReclaimCashAndNaturalGasAndPowerPrepaymentsTotal [2]
Letters of credit issued 459cpn_LettersOfCreditIssued 450cpn_LettersOfCreditIssued
First priority liens under power and natural gas agreements 33cpn_FirstPriorityLiensUnderPowerAndNaturalGasAgreements 48cpn_FirstPriorityLiensUnderPowerAndNaturalGasAgreements
First priority liens under interest rate swap agreements 120cpn_FirstPriorityLiensUnderInterestRateSwapAgreements 116cpn_FirstPriorityLiensUnderInterestRateSwapAgreements
Total letters of credit and first priority liens with our counterparties 612cpn_LettersOfCreditIssuedAndFirstPriorityLiensUnderPowerNaturalGasAndInterestRateSwapAgreements 614cpn_LettersOfCreditIssuedAndFirstPriorityLiensUnderPowerNaturalGasAndInterestRateSwapAgreements
Margin deposits held by us posted by our counterparties 40us-gaap_SecurityDepositLiability [1],[3] 47us-gaap_SecurityDepositLiability [1],[3]
Letters of credit posted with us by our counterparties 60cpn_LettersOfCreditPostedByCounterparties 61cpn_LettersOfCreditPostedByCounterparties
Total margin deposits and letters of credit posted with us by our counterparties 100cpn_DerivativeCollateralObligationToReturnCashAndLettersOfCreditPostedByCounterparties 108cpn_DerivativeCollateralObligationToReturnCashAndLettersOfCreditPostedByCounterparties
Use of Collateral (Textuals) [Abstract]    
Margin And Prepayment Amounts Included In Other Assets 13cpn_MarginAndPrepaymentAmountsIncludedInOtherAssets 9cpn_MarginAndPrepaymentAmountsIncludedInOtherAssets
Margin And Prepayment Amounts Included In Margin Deposits And Other Prepaid Expenses $ 115cpn_MarginAndPrepaymentAmountsIncludedInMarginDepositsAndOtherPrepaidExpenses $ 109cpn_MarginAndPrepaymentAmountsIncludedInMarginDepositsAndOtherPrepaidExpenses
[1] Balances are subject to master netting arrangements and presented on a gross basis on our Consolidated Condensed Balance Sheets. We do not offset fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement for financial statement presentation, and we do not offset amounts recognized for the right to reclaim, or the obligation to return, cash collateral with corresponding derivative instrument fair values. See Note 5 for further discussion of our derivative instruments subject to master netting arrangements.
[2] At March 31, 2015 and December 31, 2014, $115 million and $109 million, respectively, were included in margin deposits and other prepaid expense and $13 million and $9 million, respectively, were included in other assets on our Consolidated Condensed Balance Sheets.
[3] Included in other current liabilities on our Consolidated Condensed Balance Sheets.