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Provisions - Summary of Provisions (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
CAD ($)
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year $ 159.3
Increase in existing provisions, other provisions 106.3
Acquisitions 21.3
Paid or otherwise settled (97.9)
Impact of foreign exchange 8.8
Balance, end of the year 197.8
Less current portion 48.1
Long-term portion 149.7
Self-insured liabilities  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 109.5
Increase in existing provisions, other provisions 26.0
Acquisitions 0.0
Paid or otherwise settled (46.7)
Impact of foreign exchange 5.8
Balance, end of the year 94.6
Less current portion 7.6
Long-term portion 87.0
Claims  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 20.4
Increase in existing provisions, other provisions 56.8
Acquisitions 10.8
Paid or otherwise settled (37.4)
Impact of foreign exchange 2.0
Balance, end of the year 52.6
Less current portion 26.6
Long-term portion 26.0
Lease restoration  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 12.7
Increase in existing provisions, other provisions 2.9
Acquisitions 3.5
Paid or otherwise settled (2.0)
Impact of foreign exchange 0.4
Balance, end of the year 17.5
Less current portion 3.0
Long-term portion 14.5
Onerous contracts  
Reconciliation of changes in other provisions [abstract]  
Balance, beginning of the year 16.7
Increase in existing provisions, other provisions 20.6
Acquisitions 7.0
Paid or otherwise settled (11.8)
Impact of foreign exchange 0.6
Balance, end of the year 33.1
Less current portion 11.0
Long-term portion $ 22.1