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Debt - Schedule of Debt Outstanding (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Oct. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Long-term debt, gross $ 60.8    
Unamortized debt issuance costs (1.2)   $ (0.7)
Total debt 59.6   53.4
Non-current debt 59.6   53.4
Revolving credit facility      
Debt Instrument [Line Items]      
Long-term debt, gross $ 10.8   4.1
Unamortized debt issuance costs   $ (0.8)  
Loan Notes | Loan Notes due 2023      
Debt Instrument [Line Items]      
Debt stated interest rate 4.88%    
Long-term debt, gross $ 25.0   25.0
Loan Notes | Loan Notes due 2026      
Debt Instrument [Line Items]      
Debt stated interest rate 4.94%    
Long-term debt, gross $ 25.0   $ 25.0