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Derivative Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
June 30, 2015 Interest Rate Swaps [Member]  
Trading Activity, Gains and Losses, Net [Line Items]  
Derivative, Fixed Interest Rate 2.43%us-gaap_DerivativeFixedInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_June302015InterestRateSwapsMember
Notional amount of debt $ 200pxd_SwapContractNotionalAmountFixedRateofInterestandVariableOnTheRun10yrTreasuryRate
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_June302015InterestRateSwapsMember
September 30, 2015 Interest Rate Swaps [Member]  
Trading Activity, Gains and Losses, Net [Line Items]  
Derivative, Fixed Interest Rate 2.37%us-gaap_DerivativeFixedInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_September302015InterestRateSwapsMember
Notional amount of debt $ 150pxd_SwapContractNotionalAmountFixedRateofInterestandVariableOnTheRun10yrTreasuryRate
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_September302015InterestRateSwapsMember