Nature of Operations (Reconciliation Of Total Consolidated Operating Income To Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Segment operating income	$ 249.4	$ 243.8	$ 195.9
Interest expense	39.2	35.4	49.5
Other non-operating (income) expense, net	(32.5)	(13.7)	(4.2)
Earnings from continuing operations before income taxes	$ 242.7	$ 222.1	$ 150.6