Accounts payable and accrued liabilities - Schedule of accounts payable and accrued liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Accounts payable	$ 125.2	$ 134.5
Accrued expenses	23.8	14.5
Accrued compensation	8.0	3.1
Total accounts payable and accrued liabilities	157.0	152.1
Non-current accounts payable	(6.6)	0.0
Current accounts payable and accrued liabilities	$ 150.4	$ 152.1