Loans and Leases (Recorded Investment in Each Class of Total Loans and Leases by Credit Quality Indicator) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Total Loans and Leases	$ 12,932	$ 11,957
Investment Grade [Member]
Total Loans and Leases	11,860	10,786
Investment Grade [Member] | Institutional [Member] | Investment Funds [Member]
Total Loans and Leases	8,145	6,674
Investment Grade [Member] | Institutional [Member] | Commercial and Financial [Member]
Total Loans and Leases	836	579
Investment Grade [Member] | Institutional [Member] | Purchased Receivables [Member]
Total Loans and Leases	1,685	2,199
Investment Grade [Member] | Institutional [Member] | Lease Financing [Member]
Total Loans and Leases	1,150	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	4	3
Investment Grade [Member] | Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases	39	49
Speculative [Member]
Total Loans and Leases	983	929
Speculative [Member] | Institutional [Member] | Investment Funds [Member]
Total Loans and Leases	106	120
Speculative [Member] | Institutional [Member] | Commercial and Financial [Member]
Total Loans and Leases	173	101
Speculative [Member] | Institutional [Member] | Lease Financing [Member]
Total Loans and Leases	174	191
Speculative [Member] | Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	375	362
Speculative [Member] | Other - Acquired-Credit-Impaired [Member] | Commercial Real Estate [Member]
Total Loans and Leases	47	47
Speculative [Member] | Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases	108	108
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	89	192
Doubtful [Member] | Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	76	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	13	49
Doubtful [Member] | Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases		15
Institutional [Member] | Investment Funds [Member]
Total Loans and Leases	8,251	6,794
Institutional [Member] | Commercial and Financial [Member]
Total Loans and Leases	1,009	730
Institutional [Member] | Purchased Receivables [Member]
Total Loans and Leases	1,685	2,199
Institutional [Member] | Lease Financing [Member]
Total Loans and Leases	1,324	1,470
Property Development [Member] | Commercial Real Estate [Member]
Total Loans and Leases	452	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	64	99
Other [Member] | Commercial Real Estate [Member]
Total Loans and Leases	147	172
Institutional [Member]
Total Loans and Leases	12,269	11,193
Commercial Real Estate [Member]
Total Loans and Leases	$ 663	$ 764