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Goodwill and Intangible Assets - Future Amortization of Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
2021 $ 5.7  
2022 3.8  
2023 2.9  
2024 2.5  
2025 1.9  
Thereafter 11.3  
Total $ 28.1 $ 28.1