CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Noninterest Income
Trust, Investment and Other Servicing Fees	$ 575.2		$ 514.9
Foreign Exchange Trading Income	61.9		84.8
Treasury Management Fees	17.4		18.6
Security Commissions and Trading Income	18.3		15.0
Other Operating Income	38.6		35.7
Investment Security Gains (Losses), net	(2.4)	[1]	(5.5)	[1]
Total Noninterest Income	709.0		663.5
Net Interest Income
Interest Income	341.0		347.1
Interest Expense	84.6		112.7
Net Interest Income	256.4		234.4
Provision for Credit Losses	5.0		15.0
Net Interest Income after Provision for Credit Losses	251.4		219.4
Noninterest Expense
Compensation	321.6		294.0
Employee Benefits	68.1		54.8
Outside Services	128.2		124.0
Equipment and Software	90.8		73.4
Occupancy	41.8		42.6
Visa Indemnification Benefit			(10.1)
Other Operating Expense	73.1		74.2
Total Noninterest Expense	723.6		652.9
Income before Income Taxes	236.8		230.0
Provision for Income Taxes	75.6		79.0
Net Income	161.2		151.0
Net Income Applicable to Common Stock	$ 161.2		$ 151.0
Per Common Share
Net Income - Basic	$ 0.66		$ 0.62
Net Income - Diluted	$ 0.66		$ 0.61
Average Number of Common Shares Outstanding - Basic	241,090,093		242,126,162
Average Number of Common Shares Outstanding - Diluted	241,556,096		242,969,629

[1] Changes in Other-Than-Temporary-Impairment (OTTI) Losses $ (3.1 ) $ 0.1 Noncredit-related OTTI Losses Recorded in/(Reclassified from) OCI - (5.2 ) Other Security Gains (Losses), net 0.7 (0.4 ) Investment Security Gains (Losses), net $ (2.4 ) $ (5.5 )