Goodwill And Identifiable Intangibles (Estimated Amortization Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangibles	$ 35.6	$ 21.6	$ 19.6
Estimated amortization expense, 2018	34.3
Estimated amortization expense, 2019	30.8
Estimated amortization expense, 2020	27.3
Estimated amortization expense, 2021	23.8
Estimated amortization expense, 2022	$ 20.3