Loans And Leases (Net Loans) (Details) (USD $)	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2009
Total Loans and Leases	$ 11,740,000,000		$ 11,957,000,000
Allowance for loan losses	(22,000,000)	(54,000,000)	(100,000,000)	(101,000,000)	(102,000,000)	(79,000,000)
Loans and leases, net of allowance for loan losses	11,718,000,000		11,857,000,000
Institutional [Member]
Total Loans and Leases	11,137,000,000		11,193,000,000
Allowance for loan losses	(22,000,000)		(31,000,000)
U.S. [Member]
Investment funds	6,456,000,000		5,316,000,000
Commercial and financial	637,000,000		540,000,000
Commercial real estate	603,000,000		764,000,000
Purchased receivables	673,000,000		728,000,000
Lease financing	399,000,000		417,000,000
Non-U.S. [Member]
Investment funds	1,505,000,000		1,478,000,000
Commercial and financial	207,000,000		190,000,000
Purchased receivables	403,000,000		1,471,000,000
Lease financing	$ 857,000,000		$ 1,053,000,000