Nature Of Operations And Significant Accounting Policies (Schedule Of Changes To Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 28.7
Balance at beginning of period, net of accumulated amortization	317.1	$ 353.5	$ 408.9
Amortization expense	(30.7)	(31.5)	(37.9)
Finite-Lived Intangible Assets, Translation Adjustments	(4.2)	(4.9)	(17.5)
Balance at end of period, net of accumulated amortization	282.2	$ 317.1	$ 353.5
Finite-Lived Intangible Assets, Amortization Expense, Year Two	26.1
Finite-Lived Intangible Assets, Amortization Expense, Year Three	23.4
Finite-Lived Intangible Assets, Amortization Expense, Year Four	20.3
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	$ 156.7