Earnings (Loss) Per Share (Weighted Average Common and Common Equivalent Shares) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share [Abstract]
Net income from continuing operations	$ 317.3	$ 284.2	$ 235.3
Loss from discontinued operations, net of income taxes	(0.9)	(2.8)	(8.7)
NET INCOME	$ 316.4	$ 281.4	$ 226.6
Weighted average common shares outstanding used in calculating basic earnings per share	123.8	144.8	156.9
Effect of dilutive stock options	2.0	2.5	1.7
Weighted average common shares used in calculating diluted earnings per share	125.8	147.3	158.6
Basic EPS amounts
Continuing operations	$ 2.56	$ 1.96	$ 1.50
Discontinued operations	$ (0.01)	$ (0.02)	$ (0.06)
Net income	$ 2.56	$ 1.94	$ 1.44
Diluted EPS amounts:
Continuing operations	$ 2.52	$ 1.93	$ 1.48
Discontinued operations	$ (0.01)	$ (0.02)	$ (0.05)
Net income	$ 2.52	$ 1.91	$ 1.43