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Goodwill and Intangible Assets - Future Amortization (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Estimated future amortization expense related to amortizable intangible asset:    
2022 $ 32.8  
2023 29.7  
2024 27.5  
2025 26.6  
2026 28.4  
Thereafter 66.8  
Net Carrying Amount, intangible assets subject to amortization $ 211.8 $ 229.1