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Goodwill And Identifiable Intangibles (Estimated Amortization Expense) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization of intangibles $ 9.3 $ 9.3
Estimated amortization expense, 2019 [1] 35.5  
Estimated amortization expense, 2020 [1] 31.9  
Estimated amortization expense, 2021 [1] 28.3  
Estimated amortization expense, 2022 [1] 24.7  
Estimated amortization expense, 2023 [1] 22.4  
Estimated amortization expense, 2024 [1] $ 20.8  
[1] Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization of intangible assets and other events.