XML 64 R48.htm IDEA: XBRL DOCUMENT v3.21.1
Estimated Future Amortization Expense of Other Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]    
2021 $ 8.5  
2022 7.4  
2023 5.7  
2024 5.4  
2025 5.3  
Thereafter 6.2  
Other intangible assets, net $ 38.5 $ 42.8