Document And Entity Information - shares	6 Months Ended
	Aug. 03, 2019	Aug. 21, 2019
Document And Entity Information [Abstract]
Entity File Number	0-14678
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	Ross Stores, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-1390387
Entity Address, Address Line One	5130 Hacienda Drive,
Entity Address, Postal Zip Code	94568-7579
Title of 12(b) Security	Common stock,
Trading Symbol	ROST
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		361,730,420
Amendment Flag	false
Document Period End Date	Aug. 03, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000745732
Current Fiscal Year End Date	--02-01
Entity Address, City or Town	Dublin,
Entity Address, State or Province	CA
City Area Code	(925)
Local Phone Number	965-4400