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Goodwill and Identifiable Intangible Assets - Future Estimated Amortization of Identifiable Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Year Ended December 31,    
2024 $ 35.0  
2025 33.2  
2026 28.0  
2027 23.6  
2028 21.2  
Thereafter 108.3  
Net $ 249.2 $ 282.5