CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (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, 2011		$ 35.9	$ 2,591.1	$ 461.8	$ 6,611.0	$ (1,530.1)
Common Stock Activity		0.1	13.1
Other Comprehensive Income (Loss)	328.5			328.5
Net Income	660.5				660.5
Dividends to Stockholders (per common share: $0.405; $0.340)					(98.1)
Purchases of Treasury Stock	(400.5)					(400.5)
Balance at End of Period at Sep. 30, 2012	8,673.3	36.0	2,604.2	790.3	7,173.4	(1,930.6)
Balance at Beginning of Year at Jun. 30, 2012
Other Comprehensive Income (Loss)	189.8
Net Income	230.2				230.2
Purchases of Treasury Stock	(100.2)
Balance at End of Period at Sep. 30, 2012	8,673.3				7,173.4
Balance at Beginning of Year at Dec. 31, 2012	8,612.6	36.0	2,607.7	628.0	7,371.6	(2,030.7)
Common Stock Activity		0	16.1
Other Comprehensive Income (Loss)	(218.4)			(218.4)
Net Income	636.9				636.9
Dividends to Stockholders (per common share: $0.405; $0.340)					(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 Jun. 30, 2013
Other Comprehensive Income (Loss)	192.9
Net Income	205.7				205.7
Purchases of Treasury Stock	(75.0)
Balance at End of Period at Sep. 30, 2013	$ 8,669.9				$ 7,899.7