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Derivative Financial Instruments Derivative Financial Instruments (Schedule of Marketing Derivative Contracts Volume and Weighted Average Prices) (Details) (Details)
Mar. 31, 2015
May 05, 2015
Marketing Oil contracts, in BBL [Member] | Basis Swap Contracts for Current Year [Member]    
Derivative [Line Items]    
Derivative, Nonmonetary Notional Amount 10,000invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_MarketingOilcontractsinBBLMember
/ us-gaap_TradingActivityByTypeAxis
= pxd_BasisSwapContractsforCurrentYearMember		  
Marketing oil contracts, price per BBL [Member] [Member] | Basis Swap Contracts for Current Year [Member]    
Derivative [Line Items]    
Derivative, Swap Type, Average Fixed Price 2.99us-gaap_DerivativeSwapTypeAverageFixedPrice
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_MarketingoilcontractspriceperBBLMember
/ us-gaap_TradingActivityByTypeAxis
= pxd_BasisSwapContractsforCurrentYearMember		  
Subsequent Event [Member] | Marketing Oil contracts, in BBL [Member] | Basis Swap Contracts for June 2015 [Member]    
Derivative [Line Items]    
Derivative, Nonmonetary Notional Amount   6,000invest_DerivativeNonmonetaryNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_MarketingOilcontractsinBBLMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TradingActivityByTypeAxis
= pxd_BasisSwapContractsforJune2015Member
Subsequent Event [Member] | Marketing oil contracts, price per BBL [Member] [Member] | Basis Swap Contracts for June 2015 [Member]    
Derivative [Line Items]    
Derivative, Swap Type, Average Fixed Price   5.70us-gaap_DerivativeSwapTypeAverageFixedPrice
/ us-gaap_DerivativeInstrumentRiskAxis
= pxd_MarketingoilcontractspriceperBBLMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TradingActivityByTypeAxis
= pxd_BasisSwapContractsforJune2015Member