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Goodwill And Other Intangible Assets (Finite Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Goodwill And Other Intangible Assets [Abstract]    
2020 $ 2.4  
2021 2.4  
2022 2.4  
2023 2.4  
2024 2.4  
After 2024 9.5  
Total Net Carrying Amount $ 21.5 $ 24.5