| Document and Entity Information | Jul. 13, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000891024 |
| Document Type | 8-K |
| Document Period End Date | Jul. 13, 2021 |
| Entity Registrant Name | PATTERSON COMPANIES, INC. |
| Entity Incorporation State Country Code | MN |
| Entity File Number | 0-20572 |
| Entity Tax Identification Number | 41-0886515 |
| Entity Address, Address Line One | 1031 Mendota Heights Road |
| Entity Address, City or Town | St. Paul |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55120 |
| City Area Code | (651) |
| Local Phone Number | 686-1600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $.01 |
| Trading Symbol | PDCO |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
