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Provisions - Schedule of Provisions (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
CAD ($)
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year $ 186.5
Current year provisions 79.3
Acquisitions 24.2
Paid or otherwise settled (67.1)
Impact of foreign exchange 11.4
Balance, end of the year 234.3
Less current portion 66.4
Long-term portion 167.9
Self-insured liabilities  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 86.6
Current year provisions 43.7
Acquisitions 0.0
Paid or otherwise settled (23.8)
Impact of foreign exchange 6.6
Balance, end of the year 113.1
Less current portion 11.6
Long-term portion 101.5
Claims  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 46.7
Current year provisions 22.6
Acquisitions 20.3
Paid or otherwise settled (22.6)
Impact of foreign exchange 3.0
Balance, end of the year 70.0
Less current portion 39.1
Long-term portion 30.9
Lease restoration  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 28.5
Current year provisions 3.5
Acquisitions 1.4
Paid or otherwise settled (5.0)
Impact of foreign exchange 1.2
Balance, end of the year 29.6
Less current portion 5.2
Long-term portion 24.4
Onerous contracts  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 24.7
Current year provisions 9.5
Acquisitions 2.5
Paid or otherwise settled (15.7)
Impact of foreign exchange 0.6
Balance, end of the year 21.6
Less current portion 10.5
Long-term portion $ 11.1