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Supplemental balance sheet information - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Detail)
$ in Millions
Jun. 30, 2020
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
2020 $ 60.9
2021 51.1
2022 43.4
2023 39.0
2024 $ 31.3