CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) (USD $) In Millions, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Balance at Beginning of Year at Dec. 31, 2012		$ 36.0	$ 2,607.7	$ 628.0	$ 7,371.6	$ (2,030.7)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			16.1
Other Comprehensive Income (Loss)	(218.4)			(218.4)
Net Income	636.9				636.9
Dividends to Stockholders (per common share: $0.455; $0.405)					(108.8)
Purchases of Treasury Stock	(268.5)					(268.5)
Balance at End of Period at Sep. 30, 2013	8,669.9	36.0	2,623.8	409.6	7,899.7	(2,299.2)
Balance at Beginning of Year at Dec. 31, 2013	8,659.1	36.1	2,634.1	255.0	8,083.2	(2,349.3)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			17.1
Other Comprehensive Income (Loss)	293.6			293.6
Net Income	692.5				692.5
Dividends to Stockholders (per common share: $0.455; $0.405)					(117.7)
Purchases of Treasury Stock	(300.6)					(300.6)
Balance at End of Period at Sep. 30, 2014	$ 9,244.0	$ 36.1	$ 2,651.2	$ 548.6	$ 8,658.0	$ (2,649.9)