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Goodwill and Other Identifiable Intangible Assets - Estimated Future Amortization Expense for Identifiable Intangible Assets (Details)
$ in Millions
Sep. 30, 2023
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Q4 2023 $ 25.2
2024 96.6
2025 94.1
2026 94.1
2027 94.1
2028 $ 89.8