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Other Intangible Assets - Schedule of Future Estimated Amortization Expense (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
2019 $ 3.3
2020 1.9
2021 1.8
2022 1.8
2023 $ 1.8