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v3.19.1

Leases - Additional Information (Detail) | 12 Months Ended
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Feb. 02, 2019
Leases [Abstract] |
Initial terms of store leases | 10 years

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- Definition Lease Term + References No definition available. + Details
Name: | aeo_LeaseTerm
Namespace Prefix: | aeo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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