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Deferred revenue (Tables)
 12 Months Ended
Dec. 31, 2023
Revenue Recognition and Deferred Revenue [Abstract]  
Contract with Customer, Contract Asset, Contract Liability, and Receivable
As atDecember 31, 2023December 31, 2022October 31, 2022October 31, 2021
Balance, beginning of the period
$— $— $— $— 
Additions
5.4 — — — 
Foreign exchange loss0.1 — — — 
Balance, end of the period
$5.5 $— $— $— 
Current deferred revenue0.2 — — — 
Non-current deferred revenue$5.3 $— $— $—