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Accounts Payable and Accrued Liabilities (Tables)
6 Months Ended
Jun. 30, 2025
Payables and Accruals [Abstract]  
Schedule of Components of Accounts Payable and Accrued Liabilities
Accounts payable and accrued liabilities consisted of the following:
(dollars in millions)June 30,
2025
December 31,
2024
Accounts payable$16.6 $13.4 
Accrued liabilities
Research and development expenses16.2 25.9 
Employee expenses10.5 22.4 
Income taxes3.3 3.2 
Professional fees3.3 1.8 
General and administrative and commercial expenses3.2 5.1 
Total accounts payable and accrued liabilities$53.1 $71.8