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Debt - Debt for Apache and Subsidiaries (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Debt before unamortized discount $ 11,301us-gaap_DebtInstrumentFaceAmount $ 9,784us-gaap_DebtInstrumentFaceAmount
Unamortized discount (56)us-gaap_DebtInstrumentUnamortizedDiscount (59)us-gaap_DebtInstrumentUnamortizedDiscount
Total debt 11,245us-gaap_LongTermDebt 9,725us-gaap_LongTermDebt
Current maturities   (53)us-gaap_DebtCurrent
LONG-TERM DEBT 11,245us-gaap_LongTermDebtNoncurrent 9,672us-gaap_LongTermDebtNoncurrent
Commercial Paper [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 1,570us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CommercialPaperMember		  
United States [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 11,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_StatementGeographicalAxis
= country_US		 9,430us-gaap_DebtInstrumentFaceAmount
/ us-gaap_StatementGeographicalAxis
= country_US
Argentina Overdraft Lines of Credit [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount   51us-gaap_DebtInstrumentFaceAmount
/ us-gaap_StatementGeographicalAxis
= apa_ArgentinaOverdraftLinesOfCreditMember
Canada Lines of Credit [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount   2us-gaap_DebtInstrumentFaceAmount
/ us-gaap_StatementGeographicalAxis
= apa_CanadaLinesOfCreditMember
5.625% notes due 2017 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FivePointSixTwoFivePercentageNotesDueTwentySeventeenMember		 500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FivePointSixTwoFivePercentageNotesDueTwentySeventeenMember
One Point Seven Five Percentage Notes Due Twenty Seventeen [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 400us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_OnePointSevenFivePercentageNotesDueTwentySeventeenMember		 400us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_OnePointSevenFivePercentageNotesDueTwentySeventeenMember
6.9% notes due 2018 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 400us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SixPointNinePercentageNotesDueTwentyEighteenMember		 400us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SixPointNinePercentageNotesDueTwentyEighteenMember
7.0% notes due 2018 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointZeroPercentageNotesDueTwentyEighteenMember		 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointZeroPercentageNotesDueTwentyEighteenMember
7.625% notes due 2019 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSixTwoFivePercentageNotesDueTwentyNineteenMember		 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSixTwoFivePercentageNotesDueTwentyNineteenMember
3.625% notes due 2021 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_ThreePointSixTwoFivePercentageNotesDueTwentyTwentyOneMember		 500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_ThreePointSixTwoFivePercentageNotesDueTwentyTwentyOneMember
3.25% notes due 2022 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 919us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_ThreePointTwoFivePercentageNotesDueTwentyTwentyTwoMember		 919us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_ThreePointTwoFivePercentageNotesDueTwentyTwentyTwoMember
Two Point Six Two Five Percentage Notes Due Twenty Twenty Three [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 531us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_TwoPointSixTwoFivePercentageNotesDueTwentyTwentyThreeMember		 531us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_TwoPointSixTwoFivePercentageNotesDueTwentyTwentyThreeMember
7.7% notes due 2026 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 100us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSevenPercentageNotesDueTwentyTwentySixMember		 100us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSevenPercentageNotesDueTwentyTwentySixMember
7.95% notes due 2026 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 180us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointNineFivePercentageNotesDueTwentyTwentySixMember		 180us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointNineFivePercentageNotesDueTwentyTwentySixMember
6.0% notes due 2037 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 1,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SixPointZeroPercentageNotesDueTwentyThirtySevenMember		 1,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SixPointZeroPercentageNotesDueTwentyThirtySevenMember
5.1% notes due 2040 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 1,500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FivePointOnePercentageNotesDueTwentyFortyMember		 1,500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FivePointOnePercentageNotesDueTwentyFortyMember
5.25% notes due 2042 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FivePointTwoFivePercentageNotesDueTwentyFortyTwoMember		 500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FivePointTwoFivePercentageNotesDueTwentyFortyTwoMember
4.75% notes due 2043 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 1,500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FourPointSevenFivePercentageNotesDueTwentyFortyThreeMember		 1,500us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FourPointSevenFivePercentageNotesDueTwentyFortyThreeMember
4.75% notes due 2044 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 800us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FourPointTwoFivePercentageNotesDueTwentyFortyFourMember		 800us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_FourPointTwoFivePercentageNotesDueTwentyFortyFourMember
7.375% debentures due 2047 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointThreeSevenFivePercentageDebenturesDueTwentyFortySevenMember		 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointThreeSevenFivePercentageDebenturesDueTwentyFortySevenMember
7.625% debentures due 2096 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSixTwoFivePercentageDebenturesDueTwentyNinetySixMember		 150us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSixTwoFivePercentageDebenturesDueTwentyNinetySixMember
Notes Due In Twenty Sixteen And Twenty Seventeen [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 1us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_NotesDueInTwentySixteenAndTwentySeventeenMember		 1us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_NotesDueInTwentySixteenAndTwentySeventeenMember
Apache finance Canada 7.75% notes due 2029 [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount 300us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSevenFivePercentageNotesDueTwentyTwentyNineMember		 300us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SevenPointSevenFivePercentageNotesDueTwentyTwentyNineMember
Subsidiary And Other Obligations [Member]    
Debt Instrument [Line Items]    
Debt before unamortized discount $ 301us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SubsidiaryAndOtherObligationsMember		 $ 354us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= apa_SubsidiaryAndOtherObligationsMember