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Stock-Based Compensation (Narrative) (Details)
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Discount rate under the ESPP 15.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate    
Stock Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of stock-based compensation plans 1rost_NumberOfStockBasedCompensationPlans
/ us-gaap_AwardTypeAxis
= us-gaap_StockCompensationPlanMember