Consolidated Statements of Cash Flows (Unaudited - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities:
Net Income	$ 241.8	$ 230.7
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Investment Security Gains, net	(0.3)	(0.1)
Amortization and Accretion of Securities and Unearned Income, net	12.5	10.7
Provision for Credit Losses	2.0	(4.5)
Depreciation on Buildings and Equipment	22.4	23.1
Pension Plan Contributions	(9.1)	(16.5)
Change in Receivables	(95.4)	50.3
Change in Interest Payable	2.3	(6.2)
Change in Collateral With Derivative Counterparties, net	(200.1)	289.5
Other Operating Activities, net	(343.1)	(151.5)
Net Cash (Used in) Provided by Operating Activities	(299.1)	490.8
Cash Flows from Investing Activities:
Net Change in Federal Funds Sold and Securities Purchased under Agreements to Resell	(143.9)	(51.2)
Change in Interest-Bearing Deposits with Banks	716.7	(1,242.6)
Net Change in Federal Reserve Deposits	1,983.2	8,582.1
Purchases of Securities — Held to Maturity	(1,287.7)	(2,101.1)
Proceeds from Maturity and Redemption of Securities — Held to Maturity	726.3	278.4
Purchases of Securities — Available for Sale	(3,285.2)	(2,992.5)
Proceeds from Sale, Maturity and Redemption of Securities — Available for Sale	2,416.6	1,686.8
Change in Loans and Leases	(950.6)	(1,004.2)
Purchases of Buildings and Equipment	(12.0)	(25.5)
Purchases and Development of Computer Software	(65.0)	(68.4)
Change in Client Security Settlement Receivables	261.0	(660.7)
Other Investing Activities, net	293.8	404.8
Net Cash Provided by Investing Activities	653.2	2,805.9
Cash Flows from Financing Activities:
Change in Deposits	388.6	(2,817.7)
Change in Federal Funds Purchased	(88.2)	(522.2)
Change in Securities Sold under Agreements to Repurchase	(39.5)	(271.9)
Change in Short-Term Other Borrowings	(27.1)	1,064.2
Repayments of Senior Notes and Long-Term Debt	(1.4)	(230.1)
Treasury Stock Purchased	(140.3)	(107.2)
Net Proceeds from Stock Options	5.3	32.2
Cash Dividends Paid on Common Stock	(82.8)	(77.0)
Cash Dividends Paid on Preferred Stock	(5.9)	(9.5)
Other Financing Activities, net	(5.3)	747.9
Net Cash Provided by (Used in) Financing Activities	3.4	(2,191.3)
Effect of Foreign Currency Exchange Rates on Cash	202.9	(81.2)
Increase in Cash and Due from Banks	560.4	1,024.2
Cash and Due from Banks at Beginning of Year	6,444.6	3,050.6
Cash and Due from Banks at End of Period	7,005.0	4,074.8
Supplemental Disclosures of Cash Flow Information:
Interest Paid	41.8	44.9
Income Taxes Paid	215.0	40.5
Transfers from Loans to OREO	4.6	4.6
Computer Software
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	65.8	60.7
Other Intangible Assets
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	$ 2.1	$ 4.6