Nature Of Operations And Significant Accounting Policies (Schedule Of Changes To Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Intangible assets, net	$ 481.8	$ 276.8
Indefinite-lived Intangible Assets Acquired	252.8	18.2	$ 0.0
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	41.0
Balance at beginning of period, net of accumulated amortization	276.8	282.2	317.1
Amortization expense	(44.5)	(30.9)	(30.7)
Finite-Lived Intangible Assets, Translation Adjustments	(3.3)	7.3	(4.2)
Balance at end of period, net of accumulated amortization	481.8	276.8	$ 282.2
Finite-Lived Intangible Assets, Amortization Expense, Year Two	36.9
Finite-Lived Intangible Assets, Amortization Expense, Year Three	34.6
Finite-Lived Intangible Assets, Amortization Expense, Year Four	34.2
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	265.2
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 69.9	$ 0.0