Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noninterest Income
Trust, Investment and Other Servicing Fees	$ 961.5	$ 955.5	$ 1,965.1	$ 1,884.4
Foreign Exchange Trading Income	71.3	60.5	160.2	126.7
Treasury Management Fees	11.4	11.2	22.4	22.9
Security Commissions and Trading Income	33.2	23.4	74.9	46.7
Other Operating Income	56.5	38.9	90.9	67.9
Investment Security Gains (Losses), net (Note)	0.1	(0.3)	0.1	(0.5)
Total Noninterest Income	1,134.0	1,089.2	2,313.6	2,148.1
Net Interest Income
Interest Income	406.3	640.2	935.5	1,303.0
Interest Expense	34.2	222.8	155.3	463.6
Net Interest Income	372.1	417.4	780.2	839.4
Provision for Credit Losses	66.0	(6.5)	127.0	(6.5)
Net Interest Income after Provision for Credit Losses	306.1	423.9	653.2	845.9
Noninterest Expense
Compensation	460.3	455.5	960.1	937.5
Employee Benefits	90.4	89.3	188.3	175.0
Outside Services	176.2	186.4	369.0	374.8
Equipment and Software	164.2	147.2	326.4	295.5
Occupancy	60.0	50.9	111.1	102.5
Other Operating Expense	85.8	76.9	147.6	149.6
Total Noninterest Expense	1,036.9	1,006.2	2,102.5	2,034.9
Income before Income Taxes	403.2	506.9	864.3	959.1
Provision for Income Taxes	89.9	117.5	190.4	222.6
Net Income	313.3	389.4	673.9	736.5
Preferred Stock Dividends	4.8	5.9	35.3	23.2
Net Income Applicable to Common Stock	$ 308.5	$ 383.5	$ 638.6	$ 713.3
Per Common Share
Net Income — Basic (in dollars per share)	$ 1.47	$ 1.76	$ 3.03	$ 3.25
Net Income - Diluted (in dollars per share)	$ 1.46	$ 1.75	$ 3.02	$ 3.23
Average number of common shares outstanding
Average Number of Common Shares Outstanding - Basic (in shares)	208,068,635	216,139,033	208,474,883	217,182,123
Average Number of Common Shares Outstanding - Diluted (in shares)	208,568,357	217,169,539	209,192,590	218,214,075
Changes in other-than-temporary-impairment (OTTI) losses	$ 0.0	$ (0.2)	$ 0.0	$ (0.2)
Other Security Gains (Losses), net	0.1	(0.1)	0.1	(0.3)
Investment Security Gains (Losses), net	$ 0.1	$ (0.3)	$ 0.1	$ (0.5)