Income Taxes (Schedule Of The Reconciliation To U.S. Statutory Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Continuing operations tax at statutory rate	$ 51.0	$ 77.7	$ 52.7
Increase in valuation allowances on deferred domestic income tax assets	10.0	9.1	0.8
State income tax expense, net of federal benefit	9.2	7.9	3.2
AFI separation costs			15.1
Domestic production activities		(5.8)	(1.9)
Federal statute closure	(9.6)	(2.3)	(15.2)
2017 Tax Act	(1.2)	(82.5)
Excess tax benefits on share-based compensation	(3.8)
Tax on foreign and foreign-source income	(4.4)		(3.4)
Other	1.9	(2.6)
Income tax expense (benefit)	$ 53.1	$ 1.5	$ 51.3