Consolidated Statement Of Changes In Stockholders' Equity (USD $) In Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance at Dec. 31, 2010		$ 408.6	$ 920.0	$ 5,972.1	$ (305.3)	$ (165.1)
Net Unrealized Gains on Securities Available for Sale	55.2				55.2
Stock Options and Awards			(11.9)			16.7
Net Income	473.4			473.4
Net Unrealized Gains (Losses) on Cash Flow Hedges	(9.6)				(9.6)
Stock Options and Awards - Amortization			55.4
Dividends Declared - Common Stock				(205.2)
Stock Purchased						(78.1)
Foreign Currency Translation Adjustments	10.6				10.6
Stock Options and Awards - Tax Benefits			(0.6)
Pension and Other Postretirement Benefit Adjustments	16.6				16.6
Ending Balance at Sep. 30, 2011	7,152.8	408.6	962.9	6,240.3	(232.5)	(226.5)
Beginning Balance at Dec. 31, 2011	7,117.3	408.6	977.5	6,302.3	(345.6)	(225.5)
Net Unrealized Gains on Securities Available for Sale	67.3				67.3
Stock Options and Awards			(32.2)			52.3
Net Income	519.6			519.6
Net Unrealized Gains (Losses) on Cash Flow Hedges	5.5				5.5
Stock Options and Awards - Amortization			58.2
Dividends Declared - Common Stock				(214.0)
Stock Purchased						(100.0)
Foreign Currency Translation Adjustments	24.1				24.1
Stock Options and Awards - Tax Benefits			1.3
Pension and Other Postretirement Benefit Adjustments	32.8				32.8
Ending Balance at Sep. 30, 2012	$ 7,532.2	$ 408.6	$ 1,004.8	$ 6,607.9	$ (215.9)	$ (273.2)