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Goodwill and Intangible Assets - Expected Future Amortization Expense of Finite-Lived Intangible Assets (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2021 $ 111.5
2022 108.3
2023 89.4
2024 76.3
2025 72.4
Thereafter 34.9
Net Carrying Amount $ 492.8