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Intangible Assets, Including Goodwill (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Feb. 01, 2020	Jan. 28, 2017
Intangible Assets Net Including Goodwill [Abstract]
Accumulated impairment	$ 1.7	$ 2.5

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- Definition

Accumulated impairment loss.

+ References

No definition available.

+ Details

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Namespace Prefix:	aeo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

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