Income Taxes (Schedule Of Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Current, U.S. federal tax	$ 58.4	$ 38.7	$ 43.0
Current, state and local tax	5.0	5.1	5.4
Current, Non-U.S. tax	29.3	21.6	18.4
Total current	92.7	65.4	66.8
Deferred, U.S. federal tax	99.2	(28.0)	36.5
Deferred, U.S. state and local tax	0.1	1.5	(0.4)
Deferred, Non-U.S. tax	3.0	1.4	3.6
Total deferred	102.3	(25.1)	39.7
Total provision for income taxes	$ 195.0	$ 40.3	$ 106.5