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Stock-Based Compensation (Recognized Stock-Based Compensation) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
May 02, 2015
May 03, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation $ 14,288us-gaap_ShareBasedCompensation $ 12,035us-gaap_ShareBasedCompensation
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation 8,573us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember		 7,953us-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 5,106us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_PerformanceAwardsMember		 3,524us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= rost_PerformanceAwardsMember
Employee Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation $ 609us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember		 $ 558us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockMember