Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets, Customer Relationships) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortized intangible assets	$ 108.9	$ 108.9
Accumulated amortization	(89.8)	(85.0)
Foreign currency translation adjustment	(5.1)	(5.2)
Total Amortized intangible assets	$ 14.0	$ 18.7