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Consolidated Percentage of Total Net Revenue from Continuing Operations Attributable to Each Merchandise Group (Detail)
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Product Information [Line Items]      
Percentage of total net revenue 100.00%aeo_PercentageOfNetSales 100.00%aeo_PercentageOfNetSales 100.00%aeo_PercentageOfNetSales
Men's apparel and accessories      
Product Information [Line Items]      
Percentage of total net revenue 39.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductOneMember		 40.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductOneMember		 39.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductOneMember
Women's apparel and accessories (excluding aerie)      
Product Information [Line Items]      
Percentage of total net revenue 53.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductTwoMember		 52.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductTwoMember		 52.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductTwoMember
aerie      
Product Information [Line Items]      
Percentage of total net revenue 8.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductThreeMember		 8.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductThreeMember		 9.00%aeo_PercentageOfNetSales
/ us-gaap_ProductOrServiceAxis
= aeo_ProductThreeMember