Segment Results (Reconciliation Of Unallocated Corporate Segment Operating Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Corporate expenses	$ (104.2)	$ (103.0)
Separation costs	(27.1)	(4.3)
Operating income (loss)	18.3	35.8
Unallocated Corporate Segment [Member]
Segment Reporting Information [Line Items]
Corporate expenses	(1.3)	(24.4)
Separation costs	(27.1)	(4.3)
Operating income (loss)	$ (28.4)	$ (28.7)