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Goodwill and Identifiable Intangible Assets - Future Estimated Amortization of Identifiable Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Year Ended December 31,    
2022 $ 29.0  
2023 21.5  
2024 20.1  
2025 18.9  
2026 13.7  
Thereafter 60.5  
Net $ 163.8 $ 178.3