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Supplemental Balance Sheet Information - Schedule of Estimated Amortization Expense (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Estimated Amortization Expense    
Remainder of 2020 $ 12.3  
2021 16.1  
2022 15.2  
2023 15.1  
2024 14.6  
Thereafter 80.3  
Net Carrying Amount $ 153.6 $ 157.7