1.0.0.3 false Consolidated Balance Sheet (Unaudited) (USD $) In Thousands false 1 $ false false Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ false false Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 6 CURRENT ASSETS: 4 us-gaap_AssetsCurrentAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 7 Cash and cash equivalents 5 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 true true 1357364000 1357364 false false 2 true true 1181450000 1181450 false false No definition available. No authoritative reference available. false 8 Short-term investments 5 us-gaap_ShortTermInvestments us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 791999000 791999 false false No definition available. No authoritative reference available. false 9 Receivables, net of allowance 5 us-gaap_ReceivablesNetCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 1590913000 1590913 false false 2 false true 1356979000 1356979 false false No definition available. No authoritative reference available. false 10 Inventories 5 us-gaap_InventoryNet us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 539442000 539442 false false 2 false true 498567000 498567 false false No definition available. No authoritative reference available. false 11 Drilling advances 5 apa_DrillingAdvancesCurrent apa false debit instant monetary Drilling advances current. false false false false false false false false false 1 false true 138889000 138889 false false 2 false true 93377000 93377 false false Drilling advances current. No authoritative reference available. false 12 Derivative instruments 5 us-gaap_DerivativeInstrumentsAndHedges us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 29166000 29166 false false 2 false true 154280000 154280 false false No definition available. No authoritative reference available. false 13 Prepaid taxes 5 us-gaap_PrepaidTaxes us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 292332000 292332 false false 2 false true 303414000 303414 false false No definition available. No authoritative reference available. false 14 Prepaid assets and other 5 apa_PrepaidAssetsAndOtherCurrent apa false debit instant monetary Prepaid assets and other. false false false false false false false false false 1 false true 71596000 71596 false false 2 false true 70908000 70908 false false Prepaid assets and other. No authoritative reference available. true 15 Total current assets 5 us-gaap_AssetsCurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 4019702000 4019702 false false 2 false true 4450974000 4450974 false false No definition available. No authoritative reference available. true 17 Oil and gas, on the basis of full-cost accounting: 5 apa_OilAndGasOnBasisOfFullCostAccountingEquipmentAbstract apa false na duration string Oil and gas on the basis of full cost accounting Equipment Abstract false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false Oil and gas on the basis of full cost accounting Equipment Abstract false 18 Proved properties 6 apa_ProvedPropertiesNoncurrent apa false debit instant monetary Proved properties Noncurrent false false false false false false false false false 1 false true 43516994000 43516994 false false 2 false true 40639281000 40639281 false false Proved properties Noncurrent No authoritative reference available. false 19 Unproved properties and properties under development, not being amortized 6 apa_UnprovedPropertiesAndPropertiesUnderDevelopmentNotBeingAmortizedNoncurrent apa false debit instant monetary Unproved properties and properties under development not being amortized false false false false false false false false false 1 false true 1370951000 1370951 false false 2 false true 1300347000 1300347 false false Unproved properties and properties under development not being amortized No authoritative reference available. false 20 Gas gathering, transmission and processing facilities 4 apa_GasGatheringTransmissionAndProcessingFacilitiesNoncurrent apa false debit instant monetary Gas gathering transmission and processing facilities Noncurrent false false false false false false false false false 1 false true 3087572000 3087572 false false 2 false true 2883789000 2883789 false false Gas gathering transmission and processing facilities Noncurrent No authoritative reference available. false 21 Other 4 us-gaap_PropertyPlantAndEquipmentOther us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 481619000 481619 false false 2 false true 452989000 452989 false false No definition available. No authoritative reference available. true 22 Total property and equipment, gross 4 us-gaap_PropertyPlantAndEquipmentGross us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 48457136000 48457136 false false 2 false true 45276406000 45276406 false false No definition available. No authoritative reference available. false 23 Less: Accumulated depreciation, depletion and amortization 4 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true -25911605000 -25911605 false false 2 false true -21317889000 -21317889 false false No definition available. No authoritative reference available. true 24 Total property and equipment, net 4 us-gaap_PropertyPlantAndEquipmentNet us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 22545531000 22545531 false false 2 false true 23958517000 23958517 false false No definition available. No authoritative reference available. true 25 OTHER ASSETS: 4 us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 26 Restricted cash 5 us-gaap_RestrictedCashAndCashEquivalentsNoncurrent us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true 13880000 13880 false false No definition available. No authoritative reference available. false 27 Goodwill, net 5 us-gaap_Goodwill us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 189252000 189252 false false 2 false true 189252000 189252 false false No definition available. No authoritative reference available. false 28 Deferred charges and other 5 apa_DeferredChargeAndOther apa false debit instant monetary Deferred charge and other false false false false false false false false false 1 false true 471011000 471011 false false 2 false true 573862000 573862 false false Deferred charge and other No authoritative reference available. true 29 Total assets 4 us-gaap_Assets us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true 27225496000 27225496 false false 2 false true 29186485000 29186485 false false No definition available. No authoritative reference available. true 31 CURRENT LIABILITIES: 4 us-gaap_LiabilitiesCurrentAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 32 Accounts payable 5 us-gaap_AccountsPayableCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 391900000 391900 false false 2 false true 548945000 548945 false false No definition available. No authoritative reference available. false 33 Accrued operating expense 5 us-gaap_AccruedLiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 114409000 114409 false false 2 false true 168531000 168531 false false No definition available. No authoritative reference available. false 34 Accrued exploration and development 5 apa_AccruedExplorationAndDevelopmentCurrent apa false credit instant monetary Accrued exploration and development current false false false false false false false false false 1 false true 662387000 662387 false false 2 false true 964859000 964859 false false Accrued exploration and development current No authoritative reference available. false 35 Accrued compensation and benefits 5 us-gaap_EmployeeRelatedLiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 122216000 122216 false false 2 false true 111907000 111907 false false No definition available. No authoritative reference available. false 36 Accrued interest 5 us-gaap_InterestAndDividendsPayableCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 75153000 75153 false false 2 false true 91456000 91456 false false No definition available. No authoritative reference available. false 37 Accrued income taxes 5 us-gaap_AccruedIncomeTaxesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 50311000 50311 false false 2 false true 48028000 48028 false false No definition available. No authoritative reference available. false 38 Current debt 5 us-gaap_DebtCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 39669000 39669 false false 2 false true 112598000 112598 false false No definition available. No authoritative reference available. false 39 Asset retirement obligation 5 us-gaap_AssetRetirementObligationCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 267269000 267269 false false 2 false true 339155000 339155 false false No definition available. No authoritative reference available. false 40 Derivative instruments 5 us-gaap_DerivativeLiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 63842000 63842 false false 2 false true 0 0 false false No definition available. No authoritative reference available. false 41 Other 5 us-gaap_OtherLiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 199793000 199793 false false 2 false true 134956000 134956 false false No definition available. No authoritative reference available. true 42 Total current liabilities 5 us-gaap_LiabilitiesCurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1986949000 1986949 false false 2 false true 2520435000 2520435 false false No definition available. No authoritative reference available. true 43 LONG-TERM DEBT 4 us-gaap_LongTermDebtNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 5010030000 5010030 false false 2 false true 4808975000 4808975 false false No definition available. No authoritative reference available. true 44 DEFERRED CREDITS AND OTHER NONCURRENT LIABILITIES: 4 apa_DeferredCreditsAndOtherNoncurrentLiabilitiesAbstract apa false na duration string Deferred Credits And Other Noncurrent Liabilities Abstract false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false Deferred Credits And Other Noncurrent Liabilities Abstract false 45 Income taxes 5 us-gaap_DeferredTaxLiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 2643522000 2643522 false false 2 false true 3166657000 3166657 false false No definition available. No authoritative reference available. false 46 Asset retirement obligation 5 us-gaap_AssetRetirementObligationsNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 1623347000 1623347 false false 2 false true 1555529000 1555529 false false No definition available. No authoritative reference available. false 47 Other 5 us-gaap_OtherLiabilitiesNoncurrent us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 606326000 606326 false false 2 false true 626168000 626168 false false No definition available. No authoritative reference available. true 48 Total deferred credits and other noncurrent liabilities 5 apa_DeferredCreditsOtherNoncurrentLiabilitiesNoncurrent apa false credit instant monetary Deferred Credits Other Noncurrent Liabilities false false false false false false false false false 1 false true 4873195000 4873195 false false 2 false true 5348354000 5348354 false false Deferred Credits Other Noncurrent Liabilities No authoritative reference available. true 50 SHAREHOLDERS' EQUITY: 4 us-gaap_StockholdersEquityAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 51 Preferred stock, no par value, 5,000,000 shares authorized - Series B, 5.68% Cumulative, $100 million aggregate liquidation value, 100,000 shares issued and outstanding 5 us-gaap_PreferredStockValue us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 98387000 98387 false false 2 false true 98387000 98387 false false No definition available. No authoritative reference available. false 52 Common stock, $0.625 par, 430,000,000 shares authorized, 343,907,219 and 342,754,114 shares issued, respectively 5 us-gaap_CommonStockValue us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 214942000 214942 false false 2 false true 214221000 214221 false false No definition available. No authoritative reference available. false 53 Paid-in capital 5 us-gaap_AdditionalPaidInCapital us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 4563848000 4563848 false false 2 false true 4472826000 4472826 false false No definition available. No authoritative reference available. false 54 Retained earnings 5 us-gaap_RetainedEarningsAccumulatedDeficit us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 10904323000 10904323 false false 2 false true 11929827000 11929827 false false No definition available. No authoritative reference available. false 55 Treasury stock, at cost, 7,732,858 and 8,044,050 shares, respectively 5 us-gaap_TreasuryStockValue us-gaap true debit instant monetary No definition available. false false false false false false false false false 1 false true -219472000 -219472 false false 2 false true -228304000 -228304 false false No definition available. No authoritative reference available. false 56 Accumulated other comprehensive income (loss) 5 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true -206706000 -206706 false false 2 false true 21764000 21764 false false No definition available. No authoritative reference available. true 57 Total shareholders' equity 5 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 false true 15355322000 15355322 false false 2 false true 16508721000 16508721 false false No definition available. No authoritative reference available. true 58 Total liabilities and shareholders' equity 5 us-gaap_LiabilitiesAndStockholdersEquity us-gaap true credit instant monetary No definition available. false false false false false false false false false 1 true true 27225496000 27225496 false false 2 true true 29186485000 29186485 false false No definition available. No authoritative reference available. true false 2 50 false Thousands UnKnown UnKnown false true