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Asset Retirement Obligation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Asset Retirement Obligation [Line Items]      
Asset retirement obligation accretion $ 181us-gaap_AssetRetirementObligationAccretionExpense $ 238us-gaap_AssetRetirementObligationAccretionExpense $ 228us-gaap_AssetRetirementObligationAccretionExpense
Additional abandonment liabilities associated with its drilling and development program 171us-gaap_AssetRetirementObligationLiabilitiesIncurred 481us-gaap_AssetRetirementObligationLiabilitiesIncurred  
Argentina Divestiture [Member]      
Asset Retirement Obligation [Line Items]      
Asset retirement obligation accretion   $ 5us-gaap_AssetRetirementObligationAccretionExpense
/ us-gaap_BusinessAcquisitionAxis
= apa_ArgentinaDivestitureMember