XML 84 R69.htm IDEA: XBRL DOCUMENT v3.20.4
Other Intangible Assets - Schedule of Future Amortization Estimated Expense (Detail)
$ in Millions
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2020 $ 15.9
2021 14.3
2022 10.9
2023 10.2
2024 $ 7.2