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Goodwill and Other Intangible Assets - Amortization of Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
2021 $ 126.4  
2022 77.1  
2023 57.5  
2024 43.0  
2025 42.9  
Thereafter 98.2  
Net Carrying Amount $ 445.1 $ 594.1