| Cover | Oct. 28, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 28, 2020 |
| Entity File Number | 001-37760 |
| Entity Registrant Name | SiteOne Landscape Supply, Inc. |
| Entity Central Index Key | 0001650729 |
| Entity Tax Identification Number | 46-4056061 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 300 Colonial Center Parkway |
| Entity Address, Address Line Two | Suite 600 |
| Entity Address, City or Town | Roswell |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30076 |
| City Area Code | 470 |
| Local Phone Number | 277-7000 |
| 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 $0.01 per share |
| Trading Symbol | SITE |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
