Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1:	$ 2.6	$ 2.3	$ 1.8
Additions based on tax positions related to current year	0.2	1.1	0.4
Additions based on tax positions of prior years			0.3
Reductions for tax positions of prior years	(0.1)	(0.8)	(0.2)
Settlements	(0.8)
Balance at December 31:	$ 1.9	$ 2.6	$ 2.3