Plant and equipment (Tables)

9 Months Ended

Sep. 30, 2023

Disclosure of detailed information about property, plant and equipment [abstract]

Summary of plant and equipment

For the nine months ended September 30,											2023
	Assets under construction		Plant equipment and other		Computer equipment		Vehicles		Leasehold improvements		Total
Cost
Balance, beginning of the period	$	167.1	$	38.2	$	2.1	$	0.3	$	9.9	$	217.6
Additions	372.8		—		0.8		—		2.9		376.5
Transfers	(18.2)		18.2		—		—		—		—
Impairment	(87.7)		(7.2)		—		—		(1.6)		(96.5)
Balance, end of the period	434.0		49.2		2.9		0.3		11.2		497.6
Accumulated depreciation
Balance, beginning of the period	—		(5.3)		(0.3)		(0.1)		(1.5)		(7.2)
Depreciation	—		(4.5)		(0.7)		—		(0.9)		(6.1)
Balance, end of the period	—		(9.8)		(1.0)		(0.1)		(2.4)		(13.3)
Net book value	$	434.0	$	39.4	$	1.9	$	0.2	$	8.8	$	484.3