| Cover | Mar. 20, 2020 |
| Cover page. | |
| Document Period End Date | Mar. 20, 2020 |
| Document Type | 8-K |
| Entity File Number | 0-14678 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 94-1390387 |
| Entity Registrant Name | ROSS STORES, INC. |
| Local Phone Number | 965-4400 |
| Entity Address, Address Line One | 5130 Hacienda Drive |
| Entity Address, City or Town | Dublin |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94568 |
| City Area Code | 925 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $.01 |
| Trading Symbol | ROST |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000745732 |
| Amendment Flag | false |
