Guarantees and Contingent Liabilities (Tables)

3 Months Ended

Mar. 31, 2012

Guarantees and Contingent Liabilities [Abstract]

Summary of other guarantees and contingent liabilities

(Dollars in Millions)	Collateral Held		Carrying Amount		Maximum Potential Future Payments
Standby letters of credit	$	—	$	91	$	19,552
Third-party borrowing arrangements		—		—		454
Securities lending indemnifications		8,418		—		8,190
Asset sales		—		284		2,464	(a)
Merchant processing		783		80		78,567
Contingent consideration arrangements		—		7		10
Tender option bond program guarantee		5,344		—		5,171
Minimum revenue guarantees		—		18		31
Other		—		19		3,213

(a) The maximum potential future payments do not include loan sales where the Company provides standard representation and warranties to the buyer against losses related to loan underwriting documentation defects that may have existed at the time of sale that generally are identified after the occurrence of a triggering event such as delinquency. For these types of loan sales, the maximum potential future payments is generally the unpaid principal balance of loans sold measured at the end of the current reporting period. Actual losses will be significantly less than the maximum exposure, as only a fraction of loans sold will have a representation and warranty breach, and any losses on repurchase would generally be mitigated by any collateral held against the loans.

Company's representation and warranty reserve

	Three Months Ended March 31
(Dollars in Millions)	2012			2011
Balance at beginning of period	$	160		$	180
Net realized losses		(25	)		(32	)
Additions to reserve		67			33
Balance at end of period	$	202		$	181