Income Taxes (Schedule Of The Reconciliation To U.S. Statutory Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Continuing operations tax at statutory rate	$ 50.5	$ 28.0	$ 51.9
Increase in valuation allowances on deferred foreign income tax assets	16.2	19.3	18.7
State income tax expense, net of federal benefit	3.8	4.7	4.8
Separation costs	15.1	2.9
Permanent book/tax differences	(2.6)	3.0	(1.5)
Increase in valuation allowances on deferred domestic income tax assets	0.8	4.1	3.0
Domestic production activities	(3.1)	(5.1)	(5.8)
Tax on foreign and foreign-source income	(3.4)		(0.7)
Federal statute closure	(15.2)
Benefit from write-off of historical tax basis of foreign subsidiary	(13.7)
Other	2.0	(3.4)	(1.1)
Income tax expense (benefit)	$ 50.4	$ 53.5	$ 69.3