Unaudited condensed consolidated interim statements of cash flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Operating activities
Net loss for the period	$ (8.2)	$ (31.9)	$ (144.9)	$ (68.4)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation			4.2	6.9
Depreciation and amortization			6.8	3.9
Foreign exchange loss on translation			0.0	0.4
Fair value (gain) on financial instruments	(34.7)	(7.3)	(10.9)	(6.6)
Bad debt expense			0.0	1.1
Inventory write downs to net realizable value	(2.0)	(2.3)	(0.2)	(0.2)
Loss on write off of fixed assets			0.1	0.0
Interest and accretion on convertible debt			27.1	1.2
Interest paid			(0.3)	0.0
Debt extinguishment loss (Note 11)	0.0	0.0	58.9	0.0
Non-cash lease expense			(0.5)	(0.1)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities			(59.7)	(61.8)
Changes in working capital items:
Accounts receivable			(4.7)	2.3
Other receivables			0.4	5.0
Prepayments and deposits			(2.3)	(12.1)
Inventories			0.8	5.3
Lease Liabilities			0.4	5.4
Accounts payable and accrued liabilities			(6.9)	(7.9)
Net cash used in operating activities			(72.0)	(63.8)
Investing activities
Adjustments to purchases of property, plant, equipment, and other assets			(15.4)	(164.9)
Net cash used in investing activities			(15.4)	(164.9)
Financing activities
Proceeds from convertible debt			75.0	0.0
Payments of transaction costs			(1.3)	0.0
Purchase of non-controlling interest			0.0	(0.4)
Net cash provided (used in) by financing activities			73.7	(0.4)
Net change in cash, cash equivalents and restricted cash			(13.7)	(229.1)
Cash, cash equivalents and restricted cash, beginning of period			80.3	517.9	$ 517.9
Cash, cash equivalents and restricted cash, end of period	$ 66.6	$ 288.8	66.6	288.8	$ 80.3
Supplemental non-cash investing activities:
Purchases of property and equipment included in liabilities			12.6	9.8
Supplemental information:
Bad debt recovery			$ 1.0	$ 0.0