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Cover Page - shares
 3 Months Ended
Mar. 29, 2026
Apr. 24, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 29, 2026  
Document Transition Report false  
Entity File Number 001-37760  
Entity Registrant Name SiteOne Landscape Supply, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-4056061  
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  
Title of 12(b) Security Common Stock, $0.01 par value per share  
Trading Symbol SITE  
Security Exchange Name NYSE  
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 Common Stock, Shares Outstanding   44,308,229
Entity Central Index Key 0001650729  
Current Fiscal Year End Date --01-03  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false