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Goodwill and Intangible Assets - Estimated Net Amortization Expense (Detail)
$ in Millions
Jun. 30, 2020
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2020 (remaining) $ 25.6
2021 47.8
2022 45.2
2023 44.9
2024 44.0
2025 43.0
Thereafter $ 228.0