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Stock-Based Compensation (Recognized Stock-Based Compensation) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 53,001us-gaap_ShareBasedCompensation $ 46,847us-gaap_ShareBasedCompensation $ 48,952us-gaap_ShareBasedCompensation
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation 34,729us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 30,921us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 29,191us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Performance Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation 16,003us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_PerformanceAwardsMember		 13,812us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_PerformanceAwardsMember		 17,872us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_PerformanceAwardsMember
ESPP [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 2,269us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_EmployeeStockPurchasePlanMember		 $ 2,114us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_EmployeeStockPurchasePlanMember		 $ 1,889us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_EmployeeStockPurchasePlanMember