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Goodwill and Intangible Assets - Future Amortization Expense (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity  
2020 $ 49.2
2021 34.9
2022 34.7
2023 34.5
2024 $ 34.3