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Goodwill and intangible assets - Schedule of Future Amortization of Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]    
2023 $ 9.6  
2024 7.2  
2025 4.3  
2026 4.0  
2027 4.0  
Thereafter 23.3  
Total $ 52.4 $ 34.9