CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Balance at Beginning of Year at Dec. 31, 2013		$ 36.1	$ 2,634.1	$ 255.0	$ 8,064.0	$ (2,349.3)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			17.1
Other Comprehensive Income (Loss)	$ 293.6			293.6
Net Income	684.3				684.3
Dividends to Stockholders (per common share: $0.515; $0.455)					(117.7)
Purchases of Treasury Stock	(300.6)					(300.6)
Balance at End of Period at Sep. 30, 2014	9,216.6	36.1	2,651.2	548.6	8,630.6	(2,649.9)
Balance at Beginning of Year at Dec. 31, 2014	8,521.9	30.2	2,221.2	166.4	7,302.3	(1,198.2)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			18.0
Other Comprehensive Income (Loss)	(144.4)			(144.4)
Net Income	641.0				641.0
Dividends to Stockholders (per common share: $0.515; $0.455)					(129.2)
Purchases of Treasury Stock	(326.2)					(326.2)
Balance at End of Period at Sep. 30, 2015	$ 8,581.1	$ 30.2	$ 2,239.2	$ 22.0	$ 7,814.1	$ (1,524.4)