Income Taxes (Schedule Of Income Before Income Tax, Domestic And Foreign) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Income before Income Taxes, Domestic	$ 151.1	$ 185.1	$ 163.3
Income before Income Taxes, Foreign	15.2	14.8	15.8
Income before Provision for Income Taxes	$ 166.3	$ 199.9	$ 179.1