v3.24.0.1
LONG-TERM DEBT - Summary of Debt (Details)
$ in Millions, $ in Millions
Dec. 31, 2023
CAD ($)
Dec. 31, 2023
USD ($)
Dec. 29, 2023
CAD ($)
Dec. 29, 2023
USD ($)
Dec. 31, 2022
CAD ($)
Dec. 31, 2021
CAD ($)
Jun. 08, 2021
Disclosure of detailed information about borrowings [line items]              
Long-term debt $ 8,836.9       $ 9,266.8 $ 8,001.8  
Deferred finance costs (79.0)       (59.6)    
Less: Current portion of long-term debt 9.7       17.9    
Less: Derivative asset (20.0)       (58.3)    
Non-current portion of long-term debt 8,827.2       9,248.9    
Total long-term debt, net of derivative asset 8,816.9       9,208.5    
Revolving Credit Facility              
Disclosure of detailed information about borrowings [line items]              
Long-term debt     $ 1,205.0 $ 75.0      
8.500% USD senior unsecured notes, ("8.500% 2027 Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate             8.50%
Cost              
Disclosure of detailed information about borrowings [line items]              
Long-term debt 8,834.6       9,252.0    
Cost | Revolving Credit Facility              
Disclosure of detailed information about borrowings [line items]              
Long-term debt 184.9       771.8    
Cost | Loan A Term Facility              
Disclosure of detailed information about borrowings [line items]              
Long-term debt 0.0       500.0    
Cost | Loan B Term Facility              
Disclosure of detailed information about borrowings [line items]              
Long-term debt $ 961.8       $ 1,742.7    
Cost | 4.250% USD senior secured notes ("4.250% 2025 Secured Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 4.25% 4.25%     4.25%    
Long-term debt $ 661.3       $ 677.2    
Cost | 3.750% USD senior secured notes ("3.750%% 2025 Secured Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 3.75% 3.75%     3.75%    
Long-term debt $ 992.0       $ 1,015.8    
Cost | 5.125% USD senior secured notes ("5.125% 2026 Secured Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 5.125% 5.125%     5.125%    
Long-term debt $ 661.3       $ 677.2    
Cost | 3.500% USD senior secured notes ("3.500% 2028 Secured Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 3.50% 3.50%     3.50%    
Long-term debt $ 992.0       $ 1,015.8    
Cost | 6.750% USD senior secured notes ("6.750% 2031 Secured Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 6.75% 6.75%     6.75%    
Long-term debt $ 1,322.6       $ 0.0    
Cost | 4.000% USD senior notes ("4.000% 2028 Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 4.00% 4.00%     4.00%    
Long-term debt $ 992.0       $ 1,015.8    
Cost | 4.000% 2028 Notes, Initial Notes              
Disclosure of detailed information about borrowings [line items]              
Long-term debt   $ 500.0          
Cost | 4.000% 2028 Notes, Additional Notes              
Disclosure of detailed information about borrowings [line items]              
Long-term debt   $ 250.0          
Cost | 4.750% 2029 Notes Effective June 8, 2021              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 4.75% 4.75%     4.75%    
Long-term debt $ 992.0       $ 1,015.8    
Cost | 4.375% USD senior notes ("4.375% 2029 Notes")              
Disclosure of detailed information about borrowings [line items]              
Borrowings, interest rate 4.375% 4.375%     4.375%    
Long-term debt $ 727.4       $ 744.9    
Cost | Other              
Disclosure of detailed information about borrowings [line items]              
Long-term debt 347.3       75.0    
Discount              
Disclosure of detailed information about borrowings [line items]              
Long-term debt (9.6)       (5.5)    
Derivative liability              
Disclosure of detailed information about borrowings [line items]              
Long-term debt $ 90.9       $ 79.9