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Interim Financial Statements - Additional Information (Detail)	Jul. 31, 2021 Store
Accounting Policies [Abstract]
Number of retail stores	1,000
Number of international store locations	200

X

- Definition

Number of international store locations.

+ References

No definition available.

+ Details

Name:	aeo_NumberOfInternationalStoreLocations
Namespace Prefix:	aeo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of stores.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfStores
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant