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Leases (Assets Recorded Under Finance Leases) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Cost $ 85.6 $ 53.9
Accumulated depreciation (36.5) (28.8)
Net book value $ 49.1 $ 25.1
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, plant and equipment, net Property, plant and equipment, net
Auto equipment    
Property, Plant and Equipment [Line Items]    
Cost $ 32.8 $ 27.6
Accumulated depreciation (16.6) (13.0)
Net book value 16.2 14.6
Computer equipment    
Property, Plant and Equipment [Line Items]    
Cost 14.3 15.4
Accumulated depreciation (9.9) (8.4)
Net book value 4.4 7.0
Yard and others    
Property, Plant and Equipment [Line Items]    
Cost 38.5 10.9
Accumulated depreciation (10.0) (7.4)
Net book value $ 28.5 $ 3.5