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Goodwill and Other Identifiable Intangible Assets - Estimated Future Amortization Expense for Identifiable Intangible Assets (Detail)
$ in Millions
Dec. 31, 2021
USD ($)
Expected Amortization Expense  
Estimated amortization expense 2022 $ 23.3
Estimated amortization expense 2023 21.0
Estimated amortization expense 2024 20.5
Estimated amortization expense 2025 20.5
Estimated amortization expense 2026 $ 19.2