CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Cash Flows from Operating Activities:
Net Income	$ 161.2		$ 151.0
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Investment Security (Gains) Losses, net	2.4	[1]	5.5	[1]
Amortization and Accretion of Securities and Unearned Income	(19.6)		(9.0)
Provision for Credit Losses	5.0		15.0
Depreciation on Buildings and Equipment	22.4		22.2
Amortization of Computer Software	44.6		38.0
Amortization of Intangibles	4.6		3.3
Qualified Pension Plan Contribution	(12.3)		(10.6)
Visa Indemnification Benefit			(10.1)
Increase in Receivables	(17.4)		(34.9)
Decrease in Interest Payable	(13.8)		(11.8)
Net Change in Derivative Fair Value, Including Required Collateral	173.2		(53.2)
Other Operating Activities, net	407.3		(32.5)
Net Cash Provided by Operating Activities	757.6		72.9
Cash Flows from Investing Activities:
Net (Increase) Decrease in Federal Funds Sold and Securities Purchased under Agreements to Resell	(169.6)		70.0
Net Increase in Interest-Bearing Deposits with Banks	(2,174.9)		(1,540.2)
Net (Increase) Decrease in Federal Reserve Deposits and Other Interest-Bearing Assets	11,220.7		(4,155.9)
Purchases of Securities - Held to Maturity	(53.2)		(48.0)
Proceeds from Maturity and Redemption of Securities - Held to Maturity	143.9		67.2
Purchases of Securities - Available for Sale	(9,107.1)		(6,597.4)
Proceeds from Sale, Maturity and Redemption of Securities - Available for Sale	8,448.2		4,588.2
Net (Increase) Decrease in Loans and Leases	(97.3)		201.5
Purchases of Buildings and Equipment, net	(9.9)		(8.9)
Purchases and Development of Computer Software	(47.4)		(69.0)
Net Increase in Client Security Settlement Receivables	(207.0)		(602.8)
Other Investing Activities, net	(43.3)		89.6
Net Cash Provided by (Used in) Investing Activities	7,903.1		(8,005.7)
Cash Flows from Financing Activities:
Net (Decrease) Increase in Deposits	(8,744.6)		6,879.7
Net Increase in Federal Funds Purchased	1,158.4		672.7
Net Decrease in Securities Sold under Agreements to Repurchase	(914.8)		(156.0)
Net Increase in Short-Term Other Borrowings	115.9		878.0
Proceeds from Term Federal Funds Purchased			2,800.0
Repayments of Term Federal Funds Purchased			(2,119.0)
Proceeds from Senior Notes and Long-Term Debt			16.1
Repayments of Senior Notes and Long-Term Debt	(350.9)		(208.0)
Treasury Stock Purchased	(14.4)		(36.2)
Net Proceeds from Stock Options	30.6		26.4
Cash Dividends Paid on Common Stock	(67.5)		(68.6)
Other Financing Activities, net			(0.5)
Net Cash Provided by (Used in) Financing Activities	(8,787.3)		8,684.6
Effect of Foreign Currency Exchange Rates on Cash	91.6		23.0
Increase (Decrease) in Cash and Due from Banks	(35.0)		774.8
Cash and Due from Banks at Beginning of Year	4,315.3		2,818.0
Cash and Due from Banks at End of Period	4,280.3		3,592.8
Supplemental Disclosures of Cash Flow Information:
Interest Paid	413.3		124.5
Income Taxes Paid	4.8		11.3
Transfers from Loans to OREO	$ 11.0		$ 24.3

[1] Changes in Other-Than-Temporary-Impairment (OTTI) Losses $ (3.1 ) $ 0.1 Noncredit-related OTTI Losses Recorded in/(Reclassified from) OCI - (5.2 ) Other Security Gains (Losses), net 0.7 (0.4 ) Investment Security Gains (Losses), net $ (2.4 ) $ (5.5 )