| Document and Entity Information | Dec. 09, 2024 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001766502 |
| Document Type | 8-K |
| Document Period End Date | Dec. 09, 2024 |
| Entity Registrant Name | CHEWY, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38936 |
| Entity Tax Identification Number | 90-1020167 |
| Entity Address, Address Line One | 7700 West Sunrise Boulevard |
| Entity Address, City or Town | Plantation |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33322 |
| City Area Code | (786) |
| Local Phone Number | 320-7111 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A Common Stock, par value $0.01 per share |
| Trading Symbol | CHWY |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
