Earnings (Loss) Per Share and Shareholder’s Equity (Schedule Of Reconciliation Of The Numerator And Denominator Of The Basic And Diluted Earnings (Loss) Per Share (EPS) Computations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share
Basic	93.7	96.2	94.0	96.4
Stock-based compensation arrangements	0.5	0.6	0.7	0.7
Convertible Debt, Share	5.9	5.9	5.9	5.9
Diluted EPS	100.1	102.7	100.6	103.0
Income	$ 39.8	$ 33.2	$ 77.7	$ 77.7
Income, Diluted EPS	$ 39.8	$ 33.2	$ 77.7	$ 77.7
Income (loss), per basic share	$ 0.42	$ 0.35	$ 0.83	$ 0.81
Stock-based compensation arrangements, per share	0.00	(0.01)	(0.01)	(0.01)
Convertible debt, per share	(0.02)	(0.02)	(0.05)	(0.05)
Income (loss), per diluted share	$ 0.40	$ 0.32	$ 0.77	$ 0.75