v3.24.0.1
REVENUE (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers    
Revenue $ 7,515.5 $ 6,761.3
Intercompany revenue    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue (946.5) (803.1)
Solid Waste    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 6,841.4 6,221.2
Solid Waste | Total collection    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 4,420.2 3,950.1
Solid Waste | Landfills    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 940.1 837.7
Solid Waste | Transfer    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 753.7 671.8
Solid Waste | Material recovery    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 322.5 346.3
Solid Waste | Other    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 404.9 415.3
Solid Waste | Residential | Total collection    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 1,538.4 1,488.8
Solid Waste | Commercial/industrial | Total collection    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue 2,881.8 2,461.3
Environmental Services | Gross Revenue    
Disclosure of disaggregation of revenue from contracts with customers    
Revenue $ 1,620.6 $ 1,343.2