Leases (Assets Recorded Under Finance Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Cost	$ 149.5	$ 85.6
Accumulated depreciation	(48.2)	(36.5)
Net book value	$ 101.3	$ 49.1
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Property
Property, Plant and Equipment [Line Items]
Cost	$ 24.1
Accumulated depreciation	0.0
Net book value	24.1
Vehicles
Property, Plant and Equipment [Line Items]
Cost	35.7	$ 32.8
Accumulated depreciation	(18.0)	(16.6)
Net book value	17.7	16.2
Computer equipment
Property, Plant and Equipment [Line Items]
Cost	13.6	14.3
Accumulated depreciation	(10.8)	(9.9)
Net book value	2.8	4.4
Yard and other equipment
Property, Plant and Equipment [Line Items]
Cost	76.1	38.5
Accumulated depreciation	(19.4)	(10.0)
Net book value	$ 56.7	$ 28.5