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Goodwill and Other Intangible Assets - Expected Intangible Asset Amortization Expense (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2020 (excluding the nine months ended September 30, 2020) $ 3.0
2021 7.1
2022 5.2
2023 3.7
2024 3.6
Thereafter 4.9
Total $ 27.5