Document And Entity Information - USD ($)	12 Months Ended
	Feb. 01, 2020	Mar. 09, 2020	Aug. 03, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity File Number	0-14678
Entity Registrant Name	Ross Stores, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-1390387
Entity Address, Postal Zip Code	94568-7579
City Area Code	(925)
Local Phone Number	965-4400
Title of 12(b) Security	Common stock, par value $.01
Trading Symbol	ROST
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 36,753,366,881
Entity Common Stock, Shares Outstanding (in shares)		355,896,821
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Document Period End Date	Feb. 01, 2020
Current Fiscal Year End Date	--02-01
Entity Central Index Key	0000745732
Amendment Flag	false
Entity Address, Address Line One	5130 Hacienda Drive
Entity Address, City or Town	Dublin
Entity Address, State or Province	CA