Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1:	$ 1.7	$ 1.9	$ 2.6
Additions based on tax positions related to current year		0.2	0.2
Reductions for tax positions of prior years	(0.7)	(0.1)	(0.1)
Settlements		(0.3)	(0.8)
Balance at December 31:	$ 1.0	$ 1.7	$ 1.9