Document And Entity Information - USD ($)	12 Months Ended
	Jan. 30, 2016	Mar. 07, 2016	Aug. 01, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 30, 2016
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Entity Registrant Name	ROSS STORES INC
Entity Central Index Key	0000745732
Current Fiscal Year End Date	--01-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		401,287,592
Entity Public Float			$ 21,249,450,321
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes