Consolidated Statements of Cash Flows (Unaudited - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net Income	$ 502.5	$ 499.9
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Investment Security Losses, net	2.1	0.3
Amortization and Accretion of Securities and Unearned Income, net	37.2	27.5
Provision for Credit Losses	(1.0)	(14.5)
Depreciation on Buildings and Equipment	44.8	46.7
Pension Plan Contributions	(9.1)	(16.5)
Change in Receivables	(41.5)	(27.7)
Change in Interest Payable	(0.7)	(8.8)
Change in Collateral With Derivative Counterparties, net	(1,067.1)	1,152.4
Other Operating Activities, net	(120.4)	(265.4)
Net Cash (Used in) Provided by Operating Activities	(513.1)	1,527.2
Cash Flows from Investing Activities:
Net Change in Federal Funds Sold and Securities Purchased under Agreements to Resell	(249.9)	42.7
Change in Interest-Bearing Deposits with Banks	(56.1)	(3,001.4)
Net Change in Federal Reserve and Other Central Bank Deposits	101.4	1,855.1
Purchases of Securities — Held to Maturity	(2,576.5)	(4,712.9)
Proceeds from Maturity and Redemption of Securities — Held to Maturity	1,235.1	1,814.5
Purchases of Securities — Available for Sale	(6,554.3)	(5,507.2)
Proceeds from Sale, Maturity and Redemption of Securities — Available for Sale	4,432.3	3,237.4
Change in Loans and Leases	(1,373.3)	(1,328.4)
Purchases of Buildings and Equipment	(32.0)	(42.6)
Purchases and Development of Computer Software	(153.8)	(148.8)
Change in Client Security Settlement Receivables	(56.0)	(472.8)
Acquisition of a Subsidiary, Net of Cash Received	(16.9)	0.0
Other Investing Activities, net	369.6	595.9
Net Cash Used in Investing Activities	(4,930.4)	(7,668.5)
Cash Flows from Financing Activities:
Change in Deposits	2,596.2	10,491.8
Change in Federal Funds Purchased	(45.5)	(581.6)
Change in Securities Sold under Agreements to Repurchase	18.9	(855.3)
Change in Short-Term Other Borrowings	1,996.2	1,545.2
Repayments of Senior Notes and Long-Term Debt	(2.8)	(228.4)
Treasury Stock Purchased	(281.1)	(203.9)
Net Proceeds from Stock Options	26.7	75.8
Cash Dividends Paid on Common Stock	(165.1)	(154.1)
Cash Dividends Paid on Preferred Stock	(11.7)	(15.3)
Other Financing Activities, net	(3.0)	155.7
Net Cash Provided by Financing Activities	4,128.8	10,229.9
Effect of Foreign Currency Exchange Rates on Cash	208.3	6.6
(Decrease) Increase in Cash and Due from Banks	(1,106.4)	4,095.2
Cash and Due from Banks at Beginning of Year	6,418.5	3,021.0
Cash and Due from Banks at End of Period	5,312.1	7,116.2
Supplemental Disclosures of Cash Flow Information:
Interest Paid	89.7	85.6
Income Taxes Paid	413.4	224.1
Transfers from Loans to OREO	10.2	8.6
Computer Software
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	135.8	126.6
Other Intangible Assets
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	$ 4.3	$ 6.7