1.0.0.3 true Statement of Consolidated Shareholders Equity (Unaudited) (USD $) In Thousands false 1 $ true false false false Common Stock us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CommonStockMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ true false false false Series B Preferred Stock us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SeriesBPreferredStockMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 3 $ true false false false Paid-In Capital us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AdditionalPaidInCapitalMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 4 $ true false false false Treasury Stock us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_TreasuryStockMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 5 $ true false false false Retained Earnings us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_RetainedEarningsMember us-gaap_StatementEquityComponentsAxis explicitMember 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 6 $ true false false false Accumulated Other Comprehensive Income (Loss) us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AccumulatedOtherComprehensiveIncomeMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 7 $ 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 Beginning Balance at Dec. 31, 2007 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false true false false 1 true true 213326000 213326 true false 2 true true 98387000 98387 true false 3 true true 4367149000 4367149 true false 4 true true -238264000 -238264 true false 5 true true 11457592000 11457592 true false 6 true true -520211000 -520211 true false 7 true true 15377979000 15377979 false false No definition available. No authoritative reference available. false 6 Comprehensive income (loss): 3 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 false false No definition available. false 7 Net income (loss) 4 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true 3657567000 3657567 true false 6 false false 0 0 true false 7 false true 3657567000 3657567 false false No definition available. No authoritative reference available. false 8 Commodity hedges, net of income tax benefit of $124,671 and $89,376 for 2009 and 2008 respectively 4 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -172989000 -172989 true false 7 false true -172989000 -172989 false false No definition available. No authoritative reference available. true 10 Dividends: 3 us-gaap_PaymentsOfDividendsAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 false false No definition available. false 11 Preferred 4 us-gaap_DividendsPreferredStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true -4260000 -4260 true false 6 false false 0 0 true false 7 false true -4260000 -4260 false false No definition available. No authoritative reference available. false 12 Common $.45 and $.55 per share for 2009 and 2008 respectively 4 us-gaap_DividendsCommonStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true -183735000 -183735 true false 6 false false 0 0 true false 7 false true -183735000 -183735 false false No definition available. No authoritative reference available. false 13 Common shares issued 3 us-gaap_StockIssuedDuringPeriodValueNewIssues us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 885000 885 true false 2 false false 0 0 true false 3 false true 36109000 36109 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 36994000 36994 false false No definition available. No authoritative reference available. false 14 Treasury shares issued, net 3 us-gaap_TreasuryStockValueAcquiredCostMethod us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 247000 247 true false 4 false true 9283000 9283 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 9530000 9530 false false No definition available. No authoritative reference available. false 15 Compensation expense 3 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 65645000 65645 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 65645000 65645 false false No definition available. No authoritative reference available. false 16 FIN 48 3 apa_Fin48 apa false credit duration monetary Current period effect of FIN 48 liabilities that reduce equity. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -23770000 -23770 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true -23770000 -23770 false false Current period effect of FIN 48 liabilities that reduce equity. No authoritative reference available. false 17 Other 3 us-gaap_StockholdersEquityOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 131000 131 true false 4 false false 0 0 true false 5 false true 14000 14 true false 6 false false 0 0 true false 7 false true 145000 145 false false No definition available. No authoritative reference available. false 18 Ending Balance at Sep. 30, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 214211000 214211 true false 2 false true 98387000 98387 true false 3 false true 4445511000 4445511 true false 4 false true -228981000 -228981 true false 5 false true 14927178000 14927178 true false 6 false true -693200000 -693200 true false 7 false true 18763106000 18763106 false false No definition available. No authoritative reference available. false 5 Beginning Balance at Jun. 30, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false true false false 1 false false 0 0 false false 2 false true 98387000 98387 true false 3 false false 0 0 false false 4 false false 0 0 false false 5 false false 0 0 false false 6 false false 0 0 false false 7 false false 0 0 false false No definition available. No authoritative reference available. false 10 Dividends: 3 us-gaap_PaymentsOfDividendsAbstract 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 true false 3 false false 0 0 false false 4 false false 0 0 false false 5 false false 0 0 false false 6 false false 0 0 false false 7 false false 0 0 false false No definition available. false 18 Ending Balance at Sep. 30, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false false 0 0 false false 2 false true 98387000 98387 true false 3 false false 0 0 false false 4 false false 0 0 false false 5 false false 0 0 false false 6 false false 0 0 false false 7 false false 0 0 false false No definition available. No authoritative reference available. false 5 Beginning Balance at Dec. 31, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false true false false 1 false true 214221000 214221 true false 2 false true 98387000 98387 true false 3 false true 4472826000 4472826 true false 4 false true -228304000 -228304 true false 5 false true 11929827000 11929827 true false 6 false true 21764000 21764 true false 7 false true 16508721000 16508721 false false No definition available. No authoritative reference available. false 6 Comprehensive income (loss): 3 us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 false false No definition available. false 7 Net income (loss) 4 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true -870204000 -870204 true false 6 false false 0 0 true false 7 false true -870204000 -870204 false false No definition available. No authoritative reference available. false 8 Commodity hedges, net of income tax benefit of $124,671 and $89,376 for 2009 and 2008 respectively 4 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -228470000 -228470 true false 7 false true -228470000 -228470 false false No definition available. No authoritative reference available. true 10 Dividends: 3 us-gaap_PaymentsOfDividendsAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 false false No definition available. false 11 Preferred 4 us-gaap_DividendsPreferredStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true -4260000 -4260 true false 6 false false 0 0 true false 7 false true -4260000 -4260 false false No definition available. No authoritative reference available. false 12 Common $.45 and $.55 per share for 2009 and 2008 respectively 4 us-gaap_DividendsCommonStockCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false true -151040000 -151040 true false 6 false false 0 0 true false 7 false true -151040000 -151040 false false No definition available. No authoritative reference available. false 13 Common shares issued 3 us-gaap_StockIssuedDuringPeriodValueNewIssues us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 721000 721 true false 2 false false 0 0 true false 3 false true 3778000 3778 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 4499000 4499 false false No definition available. No authoritative reference available. false 14 Treasury shares issued, net 3 us-gaap_TreasuryStockValueAcquiredCostMethod us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -5706000 -5706 true false 4 false true 8832000 8832 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 3126000 3126 false false No definition available. No authoritative reference available. false 15 Compensation expense 3 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 95731000 95731 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 95731000 95731 false false No definition available. No authoritative reference available. false 17 Other 3 us-gaap_StockholdersEquityOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -2781000 -2781 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true -2781000 -2781 false false No definition available. No authoritative reference available. false 18 Ending Balance at Sep. 30, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 214942000 214942 true false 2 false true 98387000 98387 true false 3 false true 4563848000 4563848 true false 4 false true -219472000 -219472 true false 5 false true 10904323000 10904323 true false 6 false true -206706000 -206706 true false 7 false true 15355322000 15355322 false false No definition available. No authoritative reference available. false 5 Beginning Balance at Jun. 30, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false true false false 1 false false 0 0 false false 2 false true 98387000 98387 true false 3 false false 0 0 false false 4 false false 0 0 false false 5 false false 0 0 false false 6 false false 0 0 false false 7 false false 0 0 false false No definition available. No authoritative reference available. false 10 Dividends: 3 us-gaap_PaymentsOfDividendsAbstract 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 true false 3 false false 0 0 false false 4 false false 0 0 false false 5 false false 0 0 false false 6 false false 0 0 false false 7 false false 0 0 false false No definition available. false 18 Ending Balance at Sep. 30, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false false 0 0 false false 2 true true 98387000 98387 true false 3 false false 0 0 false false 4 false false 0 0 false false 5 false false 0 0 false false 6 false false 0 0 false false 7 false false 0 0 false false No definition available. No authoritative reference available. false false 7 31 false Thousands UnKnown UnKnown false true