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Goodwill and Other Intangible Assets - Schedule of Estimated Annual Amortization Expense Related to Other Intangible Assets (Detail)
$ in Millions
Dec. 31, 2019
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2020 $ 21.1
2021 20.9
2022 20.7
2023 20.7
2024 4.4
2025 and thereafter 11.9
Total $ 99.7