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Goodwill and Other Intangible Assets, Net - Estimated Amortization Expense Related to Intangible Assets (Detail)
$ in Millions
Dec. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2021 $ 19.0
2022 16.2
2023 14.5
2024 9.0
2025 7.9
Thereafter $ 23.0