Loans And Leases (Recorded Investment In Each Class Of Total Loans And Leases By Credit Quality Indicator) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Total Loans and Leases	$ 11,740	$ 11,957
Investment Grade [Member]
Total Loans and Leases	10,871	10,786
Investment Grade [Member] | Institutional [Member] | Investment Funds [Member]
Total Loans and Leases	7,843	6,674
Investment Grade [Member] | Institutional [Member] | Commercial And Financial [Member]
Total Loans and Leases	714	579
Investment Grade [Member] | Institutional [Member] | Purchased Receivables [Member]
Total Loans and Leases	1,076	2,199
Investment Grade [Member] | Institutional [Member] | Lease Financing [Member]
Total Loans and Leases	1,197	1,279
Investment Grade [Member] | Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	1	3
Investment Grade [Member] | Other Acquired Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases	3	3
Investment Grade [Member] | Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases	37	49
Speculative [Member]
Total Loans and Leases	811	929
Speculative [Member] | Institutional [Member] | Investment Funds [Member]
Total Loans and Leases	118	120
Speculative [Member] | Institutional [Member] | Commercial And Financial [Member]
Total Loans and Leases	129	101
Speculative [Member] | Institutional [Member] | Lease Financing [Member]
Total Loans and Leases	59	191
Speculative [Member] | Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	379	362
Speculative [Member] | Other Acquired Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases	31	47
Speculative [Member] | Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases	95	108
Special Mention [Member]
Total Loans and Leases	1
Special Mention [Member] | Institutional [Member] | Commercial And Financial [Member]
Total Loans and Leases	1
Substandard [Member]
Total Loans and Leases		50
Substandard [Member] | Institutional [Member] | Commercial And Financial [Member]
Total Loans and Leases		50
Doubtful [Member]
Total Loans and Leases	57	192
Doubtful [Member] | Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	52	86
Doubtful [Member] | Property Development Acquired Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases		42
Doubtful [Member] | Other Acquired Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases	5	49
Doubtful [Member] | Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases		15
Institutional [Member] | Investment Funds [Member]
Total Loans and Leases	7,961	6,794
Institutional [Member] | Commercial And Financial [Member]
Total Loans and Leases	844	730
Institutional [Member] | Purchased Receivables [Member]
Total Loans and Leases	1,076	2,199
Institutional [Member] | Lease Financing [Member]
Total Loans and Leases	1,256	1,470
Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	432	451
Property Development Acquired Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases		42
Other Acquired Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases	39	99
Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases	132	172
Institutional [Member]
Total Loans and Leases	11,137	11,193
Commercial Real Estate [Member]
Total Loans and Leases	$ 603	$ 764