Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

The basis for depreciation of the cost of an item and their estimated useful lives based on their usage is as follows:

Asset	Basis	Rate / term
Land improvements and site improvements	Declining balance	10	%
Buildings and building improvements	Straight-line	15 - 30 years
Yard, automotive and office equipment	Declining balance	20 - 30%
Computer software and equipment	Straight-line	3 - 5 years
Leasehold improvements	Straight-line	Lesser of lease term or economic life

At December 31, 2023	Cost		Accumulated depreciation		Net book value
Land	$	549.2	$	—	$	549.2
Buildings and improvements	491.1		(236.1)		255.0
Yard, automotive and office equipment	306.0		(117.5)		188.5
Computer software and equipment	108.2		(79.5)		28.7
Leasehold improvements	160.0		(37.3)		122.7
Assets under development	56.8		—		56.8
	$	1,671.3	$	(470.4)	$	1,200.9

At December 31, 2022	Cost		Accumulated depreciation		Net book value
Land	$	169.4	$	—	$	169.4
Buildings and improvements	444.4		(220.5)		223.9
Yard, automotive and office equipment	124.4		(83.1)		41.3
Computer software and equipment	83.0		(72.5)		10.5
Leasehold improvements	23.4		(16.7)		6.7
Assets under development	7.3		—		7.3
	$	851.9	$	(392.8)	$	459.1