Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Noninterest Income
Trust, Investment and Other Servicing Fees	$ 808.2	$ 748.2
Foreign Exchange Trading Income	48.1	60.5
Treasury Management Fees	14.7	16.2
Security Commissions and Trading Income	20.5	18.9
Other Operating Income	39.7	38.1
Investment Security Gains (Losses), net (Note)	(0.3)	0.3
Total Noninterest Income	930.9	882.2
Net Interest Income
Interest Income	410.3	352.0
Interest Expense	56.8	44.2
Net Interest Income	353.5	307.8
Provision for Credit Losses	(1.0)	2.0
Net Interest Income after Provision for Credit Losses	354.5	305.8
Noninterest Expense
Compensation	425.8	378.8
Employee Benefits	77.8	70.6
Outside Services	153.1	149.9
Equipment and Software	127.3	114.2
Occupancy	45.4	40.9
Other Operating Expense	65.1	74.4
Total Noninterest Expense	894.5	828.8
Income before Income Taxes	390.9	359.2
Provision for Income Taxes	114.8	113.8
Net Income	276.1	245.4
Preferred Stock Dividends	20.7	5.9
Net Income Applicable to Common Stock	$ 255.4	$ 239.5
Per Common Share
Net Income — Basic (in dollars per share)	$ 1.10	$ 1.03
Net Income - Diluted (in dollars per share)	$ 1.09	$ 1.03
Average number of common shares outstanding
Basic (in shares)	229,059,540	228,619,089
Diluted (in shares)	230,630,876	229,797,945
Changes in Other-Than-Temporary-Impairment (OTTI) Losses	$ (0.1)	$ 0.0
Other Security Gains (Losses), net	(0.2)	0.3
Investment Security Gains (Losses), net	$ (0.3)	$ 0.3