Earnings Per Share (Schedule Of Calculation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Computation of Basic And Diluted Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations Attributable to Parent		$ 259.3	$ 373.0	$ 416.3
Income from Discontinued Operations, Net of Tax, Attributable to Parent		90.7	4.8	58.3
Net Income		350.0	377.8	474.6
Dividends and equivalents for share-based awards expected to be forfeited		0.1	0.1	0.1
Net income for basic earnings per share		$ 350.1	$ 377.9	$ 474.7
Weighted-average shares outstanding		267.9	274.2	286.1
Share-based payment awards classified as participating securities		1.4	1.9	2.5
Denominator for basic earnings per share		269.3	276.1	288.6
Dilutive securities	[1]	2.2	2.8	3.2
Denominator for diluted earnings per share		271.5	278.9	291.8
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.96	$ 1.35	$ 1.44
Income from Discontinued Operations, Net of Tax, Per Basic Share		0.34	0.02	0.20
Earnings Per Share, Basic		1.30	1.37	1.64
Income (Loss) from Continuing Operations, Per Diluted Share		0.96	1.34	1.43
Income from Discontinued Operations, Net of Tax, Per Diluted Share		0.33	0.02	0.20
Earnings Per Share, Diluted		$ 1.29	$ 1.35	$ 1.63
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted		$ 1.7	$ 2.5	$ 4.0
Stock Options and Other Securities [Member]
Computation of Basic And Diluted Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS		0.2	0.2	2.3

[1] Dilutive securities include “in the money” options, non-participating restricted stock units and performance stock units. The weighted-average shares outstanding for 2015, 2014 and 2013 exclude the effect of approximately 0.2 million, 0.2 million and 2.3 million common stock equivalents, respectively, because such securities were anti-dilutive.