Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Unrecognized tax benefits balance at January 1,	$ 150.6	$ 142.6	$ 145.2
Gross change for current year positions	2.3	10.4	10.5
Increases for prior period positions	0.2	1.9	2.9
Decrease for prior period positions	(12.8)	(4.1)	(14.1)
Decrease due to settlements and payments			(1.2)
Decrease due to statute expirations	(53.4)	(0.2)	(0.7)
Unrecognized tax benefits balance at December 31,	$ 86.9	$ 150.6	$ 142.6