v3.26.3
Consolidated Statements of Equity and Redeemable Non-controlling Interest (Unaudited) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in-Capital
Retained Earnings
Accumulated  Other Comprehensive Income (Loss)
Treasury Stock
Stockholders' equity, beginning balance (in shares) at Dec. 29, 2024   44,913,300        
Stockholders' equity, beginning balance at Dec. 29, 2024 $ 1,572.5 $ 0.5 $ 626.5 $ 1,039.9 $ (6.1) $ (88.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income attributable to SiteOne (27.3)     (27.3)    
Other comprehensive (loss) income (1.0)       (1.0)  
Issuance of common shares under stock-based compensation plan ( in shares)   65,100        
Issuance of common shares under stock-based compensation plan (3.3)   (3.3)      
Stock-based compensation 13.6   13.6      
Repurchases of common stock (in shares)   (28,700)        
Repurchases of common shares (3.5)         (3.5)
Stockholders' equity, ending balance (in shares) at Mar. 30, 2025   44,949,700        
Stockholders' equity, ending balance at Mar. 30, 2025 1,551.0 $ 0.5 636.8 1,012.6 (7.1) (91.8)
Redeemable non-controlling interest, beginning balance at Dec. 29, 2024 19.4          
Increase (Decrease) in Temporary Equity [Roll Forward]            
Net (loss) income attributable to non-controlling interest (0.2)          
Redeemable non-controlling interest, ending balance at Mar. 30, 2025 19.2          
Stockholders' equity, beginning balance (in shares) at Dec. 29, 2024   44,913,300        
Stockholders' equity, beginning balance at Dec. 29, 2024 1,572.5 $ 0.5 626.5 1,039.9 (6.1) (88.3)
Stockholders' equity, ending balance (in shares) at Sep. 28, 2025   44,696,500        
Stockholders' equity, ending balance at Sep. 28, 2025 1,701.7 $ 0.5 652.7 1,200.7 (5.9) (146.3)
Redeemable non-controlling interest, beginning balance at Dec. 29, 2024 19.4          
Increase (Decrease) in Temporary Equity [Roll Forward]            
Adjustment of non-controlling interest to redemption value 3.0          
Redeemable non-controlling interest, ending balance at Sep. 28, 2025 22.8          
Stockholders' equity, beginning balance (in shares) at Mar. 30, 2025   44,949,700        
Stockholders' equity, beginning balance at Mar. 30, 2025 1,551.0 $ 0.5 636.8 1,012.6 (7.1) (91.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income attributable to SiteOne 129.0     129.0    
Other comprehensive (loss) income 2.1       2.1  
Issuance of common shares under stock-based compensation plan ( in shares)   10,400        
Issuance of common shares under stock-based compensation plan 0.4   0.4      
Stock-based compensation 2.3   2.3      
Repurchases of common stock (in shares)   (465,900)        
Repurchases of common shares (54.5)         (54.5)
Stockholders' equity, ending balance (in shares) at Jun. 29, 2025   44,494,200        
Stockholders' equity, ending balance at Jun. 29, 2025 1,630.3 $ 0.5 639.5 1,141.6 (5.0) (146.3)
Redeemable non-controlling interest, beginning balance at Mar. 30, 2025 19.2          
Increase (Decrease) in Temporary Equity [Roll Forward]            
Net (loss) income attributable to non-controlling interest 1.2          
Adjustment of non-controlling interest to redemption value 1.9          
Redeemable non-controlling interest, ending balance at Jun. 29, 2025 22.3          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income attributable to SiteOne 59.1     59.1    
Other comprehensive (loss) income (0.9)       (0.9)  
Issuance of common shares under stock-based compensation plan ( in shares)   202,300        
Issuance of common shares under stock-based compensation plan 7.6   7.6      
Stock-based compensation 5.6   5.6      
Stockholders' equity, ending balance (in shares) at Sep. 28, 2025   44,696,500        
Stockholders' equity, ending balance at Sep. 28, 2025 1,701.7 $ 0.5 652.7 1,200.7 (5.9) (146.3)
Increase (Decrease) in Temporary Equity [Roll Forward]            
Net (loss) income attributable to non-controlling interest 0.4          
Adjustment of non-controlling interest to redemption value 1.1          
Distributions to non-controlling interest (1.0)          
Redeemable non-controlling interest, ending balance at Sep. 28, 2025 $ 22.8          
Stockholders' equity, beginning balance (in shares) at Dec. 28, 2025 44,390,032 44,390,000        
Stockholders' equity, beginning balance at Dec. 28, 2025 $ 1,659.2 $ 0.5 658.1 1,191.7 (4.9) (186.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income attributable to SiteOne (26.6)     (26.6)    
Other comprehensive (loss) income (0.8)       (0.8)  
Issuance of common shares under stock-based compensation plan ( in shares)   78,400        
Issuance of common shares under stock-based compensation plan (4.4)   (4.4)      
Stock-based compensation 14.2   14.2      
Repurchases of common stock (in shares)   (155,100)        
Repurchases of common shares (20.0)         (20.0)
Stockholders' equity, ending balance (in shares) at Mar. 29, 2026   44,313,300        
Stockholders' equity, ending balance at Mar. 29, 2026 1,621.6 $ 0.5 667.9 1,165.1 (5.7) (206.2)
Redeemable non-controlling interest, beginning balance at Dec. 28, 2025 24.0          
Increase (Decrease) in Temporary Equity [Roll Forward]            
Net (loss) income attributable to non-controlling interest (0.1)          
Adjustment of non-controlling interest to redemption value 2.6          
Redeemable non-controlling interest, ending balance at Mar. 29, 2026 26.5          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income attributable to SiteOne 139.3     139.3    
Acquisition of remaining non-controlling interest (in shares)   217,000.0        
Acquisition of remaining non-controlling interest 19.7   (6.8)     26.5
Other comprehensive (loss) income (1.0)       (1.0)  
Issuance of common shares under stock-based compensation plan ( in shares)   21,100        
Issuance of common shares under stock-based compensation plan 0.3   0.3      
Stock-based compensation 2.1   2.1      
Repurchases of common stock (in shares)   (797,100)        
Repurchases of common shares (94.4)         (94.4)
Stockholders' equity, ending balance (in shares) at Jun. 28, 2026   43,754,300        
Stockholders' equity, ending balance at Jun. 28, 2026 1,687.6 $ 0.5 663.5 1,304.4 (6.7) (274.1)
Increase (Decrease) in Temporary Equity [Roll Forward]            
Net (loss) income attributable to non-controlling interest 1.0          
Adjustment of non-controlling interest to redemption value (1.0)          
Acquisition of remaining non-controlling interest (26.5)          
Redeemable non-controlling interest, ending balance at Jun. 28, 2026 0.0          
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net (loss) income attributable to SiteOne 63.9     63.9    
Other comprehensive (loss) income 0.1       0.1  
Issuance of common shares under stock-based compensation plan ( in shares)   21,700        
Issuance of common shares under stock-based compensation plan 0.9   0.9      
Stock-based compensation 5.6   5.6      
Repurchases of common stock (in shares)   (645,700)        
Repurchases of common shares $ (62.2)         (62.2)
Stockholders' equity, ending balance (in shares) at Sep. 27, 2026 43,130,316 43,130,300        
Stockholders' equity, ending balance at Sep. 27, 2026 $ 1,695.9 $ 0.5 $ 670.0 $ 1,368.3 $ (6.6) $ (336.3)
Redeemable non-controlling interest, ending balance at Sep. 27, 2026 $ 0.0