Document And Entity Information - shares
3 Months Ended
May 04, 2019
May 22, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date May 04, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Entity Registrant Name ROSS STORES INC  
Entity Central Index Key 0000745732  
Current Fiscal Year End Date --02-01  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding (in shares)   364,695,608
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Current Reporting Status Yes  
Entity Shell Company false