1.0.0.3 false Statement of Consolidated Operations (Unaudited) (USD $) In Thousands, except Per Share data false 1 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 2 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 3 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 false 4 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 5 REVENUES AND OTHER: 3 us-gaap_RevenuesAbstract 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 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 6 Oil and gas production revenues 4 us-gaap_OilAndGasSalesRevenue us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 2325705000 2325705 false false 2 true true 3368882000 3368882 false false 3 true true 6003663000 6003663 false false 4 true true 10450949000 10450949 false false No definition available. No authoritative reference available. false 7 Other 4 apa_OtherRevenues apa false credit duration monetary Other Revenues. false false false false false false false false false 1 false true 6726000 6726 false false 2 false true -3998000 -3998 false false 3 false true 55971000 55971 false false 4 false true 1867000 1867 false false Other Revenues. No authoritative reference available. true 8 Total revenues and other 4 us-gaap_OilAndGasRevenue us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 2332431000 2332431 false false 2 false true 3364884000 3364884 false false 3 false true 6059634000 6059634 false false 4 false true 10452816000 10452816 false false No definition available. No authoritative reference available. true 10 Depreciation, depletion and amortization 4 us-gaap_DepreciationAndAmortizationAbstract 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 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 11 Recurring 5 us-gaap_DepreciationAndAmortization us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 625898000 625898 false false 2 false true 600887000 600887 false false 3 false true 1779874000 1779874 false false 4 false true 1849044000 1849044 false false No definition available. No authoritative reference available. false 12 Additional 5 apa_DepreciationDepletionAndAmortizationAdditional apa false debit duration monetary The amount of capitalized costs of proved oil and gas properties, net of accumulated depreciation, depletion and amortization... false false false false false false false false false 1 false true 0 0 false false 2 false true 0 0 false false 3 false true 2818161000 2818161 false false 4 false true 0 0 false false The amount of capitalized costs of proved oil and gas properties, net of accumulated depreciation, depletion and amortization and the related deferred income taxes, that exceeds the estimated after-tax future net cash flows from proved oil and gas reserves, excluding future cash outflows associated with settling asset retirement obligations accrued on the balance sheet, using a discount rate of 10 percent per annum and prices in effect at the end of the period held flat for the life of production, except where future oil and gas sales are covered by physical contract terms or by derivative instruments that qualify, and are accounted for, as cash flow hedges. No authoritative reference available. false 13 Asset retirement obligation accretion 4 us-gaap_AssetRetirementObligationAccretionExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 26053000 26053 false false 2 false true 24970000 24970 false false 3 false true 79274000 79274 false false 4 false true 77146000 77146 false false No definition available. No authoritative reference available. false 14 Lease operating expenses 4 us-gaap_LeaseAndRentalExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 445535000 445535 false false 2 false true 488166000 488166 false false 3 false true 1248297000 1248297 false false 4 false true 1389542000 1389542 false false No definition available. No authoritative reference available. false 15 Gathering and transportation 4 us-gaap_GasGatheringTransportationMarketingAndProcessingCosts us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 36232000 36232 false false 2 false true 42375000 42375 false false 3 false true 103050000 103050 false false 4 false true 123118000 123118 false false No definition available. No authoritative reference available. false 16 Taxes other than income 4 us-gaap_TaxesOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 183931000 183931 false false 2 false true 304280000 304280 false false 3 false true 387211000 387211 false false 4 false true 845406000 845406 false false No definition available. No authoritative reference available. false 17 General and administrative 4 us-gaap_GeneralAndAdministrativeExpense us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 82492000 82492 false false 2 false true 57561000 57561 false false 3 false true 258443000 258443 false false 4 false true 218856000 218856 false false No definition available. No authoritative reference available. false 18 Financing costs, net 4 apa_FinancingCostsNet apa false debit duration monetary Financing Costs Net. false false false false false false false false false 1 false true 61684000 61684 false false 2 false true 33291000 33291 false false 3 false true 181426000 181426 false false 4 false true 116594000 116594 false false Financing Costs Net. No authoritative reference available. true 19 Total operating expenses 3 us-gaap_OperatingExpenses us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1461825000 1461825 false false 2 false true 1551530000 1551530 false false 3 false true 6855736000 6855736 false false 4 false true 4619706000 4619706 false false No definition available. No authoritative reference available. true 20 INCOME (LOSS) BEFORE INCOME TAXES 3 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 870606000 870606 false false 2 false true 1813354000 1813354 false false 3 false true -796102000 -796102 false false 4 false true 5833110000 5833110 false false No definition available. No authoritative reference available. false 21 Current income tax provision 3 us-gaap_CurrentIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 262430000 262430 false false 2 false true 305735000 305735 false false 3 false true 483171000 483171 false false 4 false true 1495641000 1495641 false false No definition available. No authoritative reference available. false 22 Deferred income tax provision (benefit) 3 us-gaap_DeferredIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 166160000 166160 false false 2 false true 316794000 316794 false false 3 false true -409069000 -409069 false false 4 false true 679902000 679902 false false No definition available. No authoritative reference available. true 23 NET INCOME (LOSS) 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 442016000 442016 false false 2 false true 1190825000 1190825 false false 3 false true -870204000 -870204 false false 4 false true 3657567000 3657567 false false No definition available. No authoritative reference available. false 24 Preferred stock dividends 3 us-gaap_PreferredStockDividends us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1420000 1420 false false 2 false true 1420000 1420 false false 3 false true 4260000 4260 false false 4 false true 4260000 4260 false false No definition available. No authoritative reference available. true 25 INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCK 3 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 440596000 440596 false false 2 true true 1189405000 1189405 false false 3 true true -874464000 -874464 false false 4 true true 3653307000 3653307 false false No definition available. No authoritative reference available. true 26 NET INCOME (LOSS) PER COMMON SHARE: 3 us-gaap_EarningsPerShareAbstract 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 3 false false 0 0 false false 4 false false 0 0 false false No definition available. false 27 Basic 4 us-gaap_EarningsPerShareBasic us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 1.31 1.31 false false 2 true true 3.55 3.55 false false 3 true true -2.61 -2.61 false false 4 true true 10.93 10.93 false false No definition available. No authoritative reference available. true 28 Diluted 4 us-gaap_EarningsPerShareDiluted us-gaap true na duration decimal No definition available. false false false false false false false false true 1 true true 1.3 1.3 false false 2 true true 3.52 3.52 false false 3 true true -2.61 -2.61 false false 4 true true 10.84 10.84 false false No definition available. No authoritative reference available. true false 4 23 false Thousands UnKnown Hundreds false true