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Segment Reporting - Reconciliation from GAAP Operating Performance Measure to Non-GAAP Adjusted Operating Income (Loss) on Consolidated Basis (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020
Segment Reporting [Abstract]
Interest expense, net	$ 8,600	$ 7,900	$ 26,000	$ 16,600
Other (income), net	$ (3,130)	$ (2,223)	$ (6,354)	$ (793)

X

- Definition

Non operating interest expense net.

+ References

No definition available.

+ Details

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

X

- 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=123367319&loc=SL114868664-224227

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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