CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (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, 2011		$ 35.9	$ 2,591.1	$ 461.8	$ 6,611.0	$ (1,530.1)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity		0.1	16.6
Retirement of Treasury Stock		0	0		0
Retirement of Stock from Treasury						0
Total Other Comprehensive Income (Loss)	166.2			166.2
Net Income	894.4				894.4
Dividends to Stockholders (per common share: $0.62; $0.55; $0.47)					(133.8)
Purchases of Treasury Stock	(500.6)					(500.6)
Balance at End of Year at Dec. 31, 2012	8,612.6	36.0	2,607.7	628.0	7,371.6	(2,030.7)
Increase (Decrease) in Stockholders' Equity
Common Stock Activity		0.1	26.4
Retirement of Treasury Stock		0	0		0
Retirement of Stock from Treasury						0
Total Other Comprehensive Income (Loss)	(373.0)			(373.0)
Net Income	858.1				858.1
Dividends to Stockholders (per common share: $0.62; $0.55; $0.47)					(146.5)
Purchases of Treasury Stock	(318.6)					(318.6)
Balance at End 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		0.1	28.4
Retirement of Treasury Stock	(1,451.7)	(6.0)	(441.3)		(1,004.4)
Retirement of Stock from Treasury						1,451.7
Total Other Comprehensive Income (Loss)	(88.6)			(88.6)
Net Income	413.4
Dividends to Stockholders (per common share: $0.62; $0.55; $0.47)					(159.4)
Purchases of Treasury Stock	(300.6)					(300.6)
Balance at End of Year at Dec. 31, 2014	$ 8,552.4	$ 30.2	$ 2,221.2	$ 166.4	$ 7,332.8	$ (1,198.2)