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Discontinued Operations - Additional Information (Detail) (USD $)
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Restructuring Cost and Reserve [Line Items]      
Cost to terminate remaining leases $ 8,571,000us-gaap_BusinessExitCosts1    
Exit or disposal costs 17,752,000us-gaap_RestructuringCharges    
Segment, Discontinued Operations      
Restructuring Cost and Reserve [Line Items]      
Number of stores leases     21aeo_NumberOfStoreLeases
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
Cost to terminate remaining leases 13,700,000us-gaap_BusinessExitCosts1
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
   
Segment, Discontinued Operations | Financial Standby Letter of Credit      
Restructuring Cost and Reserve [Line Items]      
Proceeds from line Stand-by letter 11,500,000us-gaap_ProceedsFromUnsecuredLinesOfCredit
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_FinancialStandbyLetterOfCreditMember
   
Segment, Discontinued Operations | 77 kids stores      
Restructuring Cost and Reserve [Line Items]      
Exit or disposal costs $ 13,673,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
/ us-gaap_StatementBusinessSegmentsAxis
= aeo_StoreOneMember
$ 0us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
/ us-gaap_StatementBusinessSegmentsAxis
= aeo_StoreOneMember
$ 38,067,000us-gaap_RestructuringCharges
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
/ us-gaap_StatementBusinessSegmentsAxis
= aeo_StoreOneMember