v3.24.0.1
OPERATING SEGMENTS - Revenue by Segment (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of operating segments [line items]    
Revenue $ 7,515.5 $ 6,761.3
Adjusted EBITDA 2,003.7 1,720.8
Solid Waste    
Disclosure of operating segments [line items]    
Revenue 6,052.6 5,512.4
Adjusted EBITDA 1,865.2 1,601.0
Solid Waste | Canada    
Disclosure of operating segments [line items]    
Revenue 1,819.2 1,678.2
Adjusted EBITDA 499.3 451.5
Solid Waste | USA    
Disclosure of operating segments [line items]    
Revenue 4,233.4 3,834.2
Adjusted EBITDA 1,365.9 1,149.5
Environmental Services    
Disclosure of operating segments [line items]    
Revenue 1,462.9 1,248.9
Adjusted EBITDA 382.8 307.4
Gross Revenue    
Disclosure of operating segments [line items]    
Revenue 8,462.0 7,564.4
Gross Revenue | Solid Waste    
Disclosure of operating segments [line items]    
Revenue 6,841.4 6,221.2
Gross Revenue | Solid Waste | Canada    
Disclosure of operating segments [line items]    
Revenue 2,085.0 1,926.5
Gross Revenue | Solid Waste | USA    
Disclosure of operating segments [line items]    
Revenue 4,756.4 4,294.7
Gross Revenue | Environmental Services    
Disclosure of operating segments [line items]    
Revenue 1,620.6 1,343.2
Intercompany revenue    
Disclosure of operating segments [line items]    
Revenue (946.5) (803.1)
Intercompany revenue | Solid Waste    
Disclosure of operating segments [line items]    
Revenue (788.8) (708.8)
Intercompany revenue | Solid Waste | Canada    
Disclosure of operating segments [line items]    
Revenue (265.8) (248.3)
Intercompany revenue | Solid Waste | USA    
Disclosure of operating segments [line items]    
Revenue (523.0) (460.5)
Intercompany revenue | Environmental Services    
Disclosure of operating segments [line items]    
Revenue (157.7) (94.3)
Corporate    
Disclosure of operating segments [line items]    
Revenue 0.0 0.0
Adjusted EBITDA $ (244.3) $ (187.6)