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, 2008		$ 36.3	$ 2,546.9	$ (958.2)	$ 5,527.1	$ (754.2)
Common Stock Activity		0.1	40.5
Retirement of Repurchased Common Shares		0	0		0
Cumulative Effect of Accounting Principle Change - Note 1	(455.0)			(14.3)	14.3
All Other Changes During Year	1,313.5			1,313.5
Net Income	852.6				852.6
Dividends to Stockholders (per common share: $0.395; $0.350; $0.315)					(104.5)
Purchases of Treasury Stock						0
Balance at End of Period at Dec. 31, 2009	8,500.1	36.4	2,587.4	341.0	6,289.5	(754.2)
Common Stock Activity		0.1	28.0
Retirement of Repurchased Common Shares		0	0		0
Cumulative Effect of Accounting Principle Change - Note 1	(459.0)			0	0
All Other Changes During Year	0.9			0.9
Net Income	886.1				886.1
Dividends to Stockholders (per common share: $0.395; $0.350; $0.315)					(114.8)
Purchases of Treasury Stock	(356.0)					(356.0)
Balance at End of Period at Dec. 31, 2010	8,944.4	36.5	2,615.4	341.9	7,060.8	(1,110.2)
Common Stock Activity		0.2	30.9
Retirement of Repurchased Common Shares		(0.8)	(55.2)		(144.0)
Cumulative Effect of Accounting Principle Change - Note 1				0	0
All Other Changes During Year	107.0			107.0
Net Income	235.4				235.4
Dividends to Stockholders (per common share: $0.395; $0.350; $0.315)					(121.0)
Purchases of Treasury Stock						(419.9)
Balance at End of Period at Dec. 31, 2011	$ 8,577.0	$ 35.9	$ 2,591.1	$ 448.9	$ 7,031.2	$ (1,530.1)