Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Cash Flows from Operating Activities:
Net Income	$ 164.0		$ 161.2
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Investment Security (Gains) Losses, net	(0.2)	[1]	2.4	[1]
Amortization and Accretion of Securities and Unearned Income	1.5		(19.6)
Provision for Credit Losses	5.0		5.0
Depreciation on Buildings and Equipment	22.4		22.4
Pension Plan Contribution	(16.4)		(12.3)
Change in Receivables	(32.3)		(17.4)
Change in Interest Payable	(18.8)		(13.8)
Net Changes in Derivative Fair Value, Including Required Collateral	(55.0)		173.2
Other Operating Activities, net	188.4		407.3
Net Cash Provided by (Used in) Operating Activities	312.5		757.6
Cash Flows from Investing Activities:
Net Change in Federal Funds Sold and Securities Purchased under Agreements to Resell	(190.7)		(169.6)
Change in Interest-Bearing Deposits with Banks	108.7		(2,174.9)
Net Change in Federal Reserve Deposits and Other Interest-Bearing Assets	1,791.0		11,220.7
Purchases of Securities - Held to Maturity	(2,182.6)		(53.2)
Proceeds from Maturity and Redemption of Securities - Held to Maturity	1,633.6		143.9
Purchases of Securities - Available for Sale	(2,276.8)		(9,107.1)
Proceeds from Sale, Maturity and Redemption of Securities - Available for Sale	3,728.9		8,448.2
Change in Loans and Leases	637.4		(97.3)
Purchases of Buildings and Equipment, net	(11.9)		(9.9)
Purchases and Development of Computer Software	(60.4)		(47.4)
Change in Client Settlement Receivables and Payables	1,232.6		(207.0)
Other Investing Activities, net	29.1		(43.3)
Net Cash Provided by (Used in) Investing Activities	4,438.9		7,903.1
Cash Flows from Financing Activities:
Change in Deposits	(5,778.3)		(8,744.6)
Change in Federal Funds Purchased	540.3		1,158.4
Change in Securities Sold under Agreements to Repurchase	(209.6)		(914.8)
Change in Short-Term Other Borrowings	1,057.3		115.9
Repayments of Senior Notes and Long-Term Debt	(201.0)		(350.9)
Treasury Stock Purchased	(74.2)		(14.4)
Net Proceeds from Stock Options	51.1		30.6
Cash Dividends Paid on Common Stock	(1.1)		(67.5)
Other Financing Activities, net	(52.1)
Net Cash Provided by (Used in) Financing Activities	4,667.6		(8,787.3)
Effect of Foreign Currency Exchange Rates on Cash	(63.0)		91.6
Increase (Decrease) in Cash and Due from Banks	20.8		(35.0)
Cash and Due from Banks at Beginning of Year	3,752.7		4,315.3
Cash and Due from Banks at End of Period	3,773.5		4,280.3
Supplemental Disclosures of Cash Flow Information:
Interest Paid	79.4		98.4
Income Taxes Paid	14.5		4.8
Transfers from Loans to OREO	4.4		11.0
Computer Software
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	48.7		44.6
Other Intangible Assets
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	$ 5.2		$ 4.6

[1] Changes in Other-Than-Temporary-Impairment (OTTI) Losses $ - $ (3.1 ) Noncredit-related OTTI Losses Recorded in/(Reclassified from) OCI - - Other Security Gains (Losses), net 0.2 0.7 Investment Security Gains (Losses), net $ 0.2 $ (2.4 )