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Segment Reporting - Reconcile Segment Operating Performance Measure Operating (Loss) Income (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended
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May 01, 2021 | May 02, 2020
Segment Reporting [Abstract] |  |
Interest expense, net | $ 8,500 | $ 100
Other (income) expense, net | $ (1,860) | $ 2,983

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- Definition Non operating interest expense net. + References No definition available. + Details
Name: | aeo_NonOperatingInterestExpenseNet
Namespace Prefix: | aeo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration