Consolidated Statements of Cash Flows (Unaudited - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities:
Net Income	$ 766.0	$ 734.5
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Investment Security Losses, net	1.9	0.3
Amortization and Accretion of Securities and Unearned Income, net	65.6	43.0
Provision for Credit Losses	(4.0)	(24.5)
Depreciation on Buildings and Equipment	66.8	67.4
Pension Plan Contributions	(9.1)	(16.5)
Change in Receivables	(80.5)	(13.3)
Change in Interest Payable	0.7	(5.9)
Change in Collateral With Derivative Counterparties, net	(330.1)	(165.7)
Other Operating Activities, net	(15.7)	(330.2)
Net Cash Provided by Operating Activities	671.5	483.8
Cash Flows from Investing Activities:
Net Change in Federal Funds Sold and Securities Purchased under Agreements to Resell	(445.2)	(192.9)
Change in Interest-Bearing Deposits with Banks	1,136.3	(1,399.9)
Net Change in Federal Reserve and Other Central Bank Deposits	789.7	(3,239.8)
Purchases of Securities — Held to Maturity	(5,757.3)	(7,216.7)
Proceeds from Maturity and Redemption of Securities — Held to Maturity	1,991.6	5,288.3
Purchases of Securities — Available for Sale	(11,081.1)	(7,633.7)
Proceeds from Sale, Maturity and Redemption of Securities — Available for Sale	7,548.0	6,103.4
Change in Loans and Leases	(239.3)	(1,764.9)
Purchases of Buildings and Equipment	(58.0)	(55.3)
Purchases and Development of Computer Software	(250.4)	(229.0)
Change in Client Security Settlement Receivables	173.8	(364.2)
Acquisition of a Subsidiary, Net of Cash Received	(16.9)	0.0
Other Investing Activities, net	956.1	181.4
Net Cash Used in Investing Activities	(5,252.7)	(10,523.3)
Cash Flows from Financing Activities:
Change in Deposits	3,149.2	10,940.6
Change in Federal Funds Purchased	27.0	(589.4)
Change in Securities Sold under Agreements to Repurchase	(244.8)	(400.6)
Change in Short-Term Other Borrowings	(41.9)	2,346.1
Repayments of Senior Notes and Long-Term Debt	(4.2)	(229.5)
Repayments of Senior Notes and Long-Term Debt	493.5	0.0
Treasury Stock Purchased	(346.1)	(344.4)
Net Proceeds from Stock Options	62.0	88.2
Cash Dividends Paid on Common Stock	(246.9)	(237.8)
Cash Dividends Paid on Preferred Stock	(17.6)	(21.2)
Other Financing Activities, net	(8.7)	17.4
Net Cash Provided by Financing Activities	2,821.5	11,569.4
Effect of Foreign Currency Exchange Rates on Cash	233.9	(105.8)
(Decrease) Increase in Cash and Due from Banks	(1,525.8)	1,424.1
Cash and Due from Banks at Beginning of Year	6,418.5	3,021.0
Cash and Due from Banks at End of Period	4,892.7	4,445.1
Supplemental Disclosures of Cash Flow Information:
Interest Paid	134.1	120.0
Income Taxes Paid	596.9	526.9
Transfers from Loans to OREO	12.0	10.4
Computer Software
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	203.6	185.9
Other Intangible Assets
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	$ 6.3	$ 8.8