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Goodwill and Identifiable Intangible Assets - Schedule of Expected Amortization Expense (Details)
$ in Millions
Sep. 30, 2021
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remainder of 2021 $ 33.6
2022 132.1
2023 91.5
2024 86.7
2025 86.0
2026 $ 85.4