Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Noninterest Income
Trust, Investment and Other Servicing Fees	$ 3,995.0	$ 3,852.1	$ 3,753.7
Foreign Exchange Trading Income	290.4	250.9	307.2
Treasury Management Fees	45.4	44.5	51.8
Security Commissions and Trading Income	133.2	103.6	98.3
Other Operating Income	194.0	145.5	127.5
Investment Security Gains (Losses), net	(0.4)	(1.4)	(1.0)
Total Noninterest Income	4,657.6	4,395.2	4,337.5
Net Interest Income
Interest Income	1,643.5	2,499.9	2,321.4
Interest Expense	200.3	822.0	698.7
Net Interest Income	1,443.2	1,677.9	1,622.7
Provision for Credit Losses	125.0	(14.5)	(14.5)
Net Interest Income after Provision for Credit Losses	1,318.2	1,692.4	1,637.2
Noninterest Expense
Compensation	1,947.1	1,859.0	1,806.9
Employee Benefits	387.7	355.2	356.7
Outside Services	763.1	774.5	739.4
Equipment and Software	673.5	612.1	582.2
Occupancy	230.1	212.9	201.1
Other Operating Expense	346.7	329.8	330.6
Total Noninterest Expense	4,348.2	4,143.5	4,016.9
Income before Income Taxes	1,627.6	1,944.1	1,957.8
Provision for Income Taxes	418.3	451.9	401.4
NET INCOME	1,209.3	1,492.2	1,556.4
Preferred Stock Dividends	56.2	46.4	46.4
Net Income Applicable to Common Stock	$ 1,153.1	$ 1,445.8	$ 1,510.0
PER COMMON SHARE
Net Income - Basic (in dollars per share)	$ 5.48	$ 6.66	$ 6.68
Net Income - Diluted (in dollars per share)	$ 5.46	$ 6.63	$ 6.64
Average Number of Common Shares Outstanding - Basic (in shares)	208,319,412	214,525,547	223,148,335
Average Number of Common Shares Outstanding - Diluted (in shares)	209,007,986	215,601,149	224,488,326
Note: Changes in Other-Than-Temporary-Impairment (OTTI) Losses prior to the adoption of ASU 2016-13	$ 0.0	$ (0.3)	$ (0.5)
Other Security Gains (Losses), net	(0.4)	(1.1)	(0.5)
Investment Security Gains (Losses), net	$ (0.4)	$ (1.4)	$ (1.0)