Consolidated Statement of Changes in Stockholders' Equity (USD $) In Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Dec. 31, 2013			$ 408.6	$ 1,035.7	$ 7,134.8	$ (244.3)	$ (422.8)
Net Unrealized Gains (Losses) on Securities Available for Sale	4.5					4.5
Stock Options and Awards				(43.2)			97.3
Net Income	181.4				181.4
Net Unrealized Gains (Losses) on Cash Flow Hedges	1.6					1.6
Stock Options and Awards - Amortization				23.3
Dividends Declared - Common Stock					(74.8)
Stock Purchased							(163.0)
Foreign Currency Translation Adjustments	(1.3)					(1.3)
Stock Options and Awards - Tax Benefits				7.1
Pension and Other Postretirement Benefit Adjustments	3.4					3.4
Balance at Mar. 31, 2014	7,948.3		408.6	1,022.9	7,241.4	(236.1)	(488.5)
Balance at Dec. 31, 2014	8,448.9	388.5	408.6	1,050.9	7,625.4	(319.7)	(704.8)
Net Unrealized Gains (Losses) on Securities Available for Sale	54.1					54.1
Stock Options and Awards				(60.1)			92.3
Net Income	230.7				230.7
Net Unrealized Gains (Losses) on Cash Flow Hedges	(1.1)					(1.1)
Stock Options and Awards - Amortization				23.4
Dividends Declared - Common Stock					(78.5)
Stock Purchased	(107.2)						(107.2)
Foreign Currency Translation Adjustments	(5.9)					(5.9)
Stock Options and Awards - Tax Benefits				10.7
Dividends Declared - Preferred Stock					(5.9)
Pension and Other Postretirement Benefit Adjustments	6.2					6.2
Balance at Mar. 31, 2015	$ 8,607.6		$ 408.6	$ 1,024.9	$ 7,771.7	$ (266.4)	$ (719.7)