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Goodwill and Other Identifiable Intangible Assets - Estimated Future Amortization Expense for Identifiable Intangible Assets (Details)
$ in Millions
Mar. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Q2-Q4 2019 $ 48.0
2020 62.9
2021 62.8
2022 62.6
2023 62.0
2024 $ 62.0