Consolidated Statement Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012
Cash Flows from Operating Activities:
Net Income	$ 355.1		$ 340.8
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Investment Security (Gains) Losses, net	(0.3)	[1]	1.9	[1]
Amortization and Accretion of Securities and Unearned Income	19.5		(35.2)
Provision for Credit Losses	10.0		10.0
Depreciation on Buildings and Equipment	46.4		45.1
Pension Plan Contribution	(16.4)		(12.3)
Change in Receivables	94.5		(21.9)
Change in Interest Payable	(12.2)		(1.5)
Change in Collateral with Derivative Counterparties, net	(1,902.8)		(208.2)
Other Operating Activities, net	14.6		320.7
Net Cash Provided by (Used in) Operating Activities	(1,281.7)		539.3
Cash Flows from Investing Activities:
Net Change in Federal Funds Sold and Securities Purchased under Agreements to Resell	(220.4)		98.8
Change in Interest-Bearing Deposits with Banks	169.4		(1,746.0)
Net Change in Federal Reserve Deposits and Other Interest-Bearing Assets	853.8		5,015.1
Purchases of Securities - Held to Maturity	(3,671.6)		(1,187.8)
Proceeds from Maturity and Redemption of Securities - Held to Maturity	3,256.2		200.2
Purchases of Securities - Available for Sale	(3,729.4)		(12,704.1)
Proceeds from Sale, Maturity and Redemption of Securities - Available for Sale	4,761.3		15,596.7
Change in Loans and Leases	646.5		(549.2)
Purchases of Buildings and Equipment, net	(31.7)		(16.9)
Purchases and Development of Computer Software	(130.7)		(97.7)
Change in Client Settlement Receivables	561.1		53.5
Other Investing Activities, net	246.6		(53.7)
Net Cash Provided by (Used in) Investing Activities	2,711.1		4,608.9
Cash Flows from Financing Activities:
Change in Deposits	(3,595.4)		(5,681.6)
Change in Federal Funds Purchased	1,503.2		1,227.0
Change in Securities Sold under Agreements to Repurchase	77.9		(966.0)
Change in Short-Term Other Borrowings	1,458.3		153.5
Repayments of Senior Notes and Long-Term Debt	(402.1)		(476.8)
Treasury Stock Purchased	(89.5)		(50.2)
Net Proceeds from Stock Options	108.1		52.2
Cash Dividends Paid on Common Stock	(71.8)		(136.1)
Other Financing Activities, net	574.8
Net Cash Provided by (Used in) Financing Activities	(436.5)		(5,878.0)
Effect of Foreign Currency Exchange Rates on Cash	(114.7)		8.8
Increase (Decrease) in Cash and Due from Banks	878.2		(721.0)
Cash and Due from Banks at Beginning of Year	3,752.7		4,315.3
Cash and Due from Banks at End of Period	4,630.9		3,594.3
Supplemental Disclosures of Cash Flow Information:
Interest Paid	127.9		153.6
Income Taxes Paid	91.9		66.1
Transfers from Loans to OREO	14.7		26.5
Computer Software
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	99.6		90.1
Other Intangible Assets
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Amortization of Intangibles	$ 10.3		$ 9.8

[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 0.1 0.5 0.3 1.2 Investment Security Gains (Losses), net $ 0.1 $ 0.5 $ 0.3 $ (1.9 )