Loans and Leases (Recorded Investment in Each Class of Total Loans and Leases by Credit Quality Indicator) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 13,486		$ 12,307
Investment Funds
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	10,413		9,205
Commercial and Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,526		1,133
Purchased Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	243		394
Lease Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,095		1,164
Property Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	180		377
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	29		34
Institutional
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	13,277		11,896
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	209		411
Investment grade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	12,362	[1]	11,538	[1]
Investment grade | Investment Funds
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	10,282	[1]	8,937	[1]
Investment grade | Commercial and Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	740	[1]	1,041	[1]
Investment grade | Purchased Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	243	[1]	394	[1]
Investment grade | Lease Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,068	[1]	1,137	[1]
Investment grade | Property Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[1]	0	[1]
Investment grade | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	29	[1]	29	[1]
Speculative
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	1,108	[2]	769	[2]
Speculative | Investment Funds
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	131	[2]	268	[2]
Speculative | Commercial and Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	770	[2]	92	[2]
Speculative | Purchased Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[2]	0	[2]
Speculative | Lease Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	27	[2]	27	[2]
Speculative | Property Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	180	[2]	377	[2]
Speculative | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[2]	5	[2]
Special mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	16	[3]
Special mention | Investment Funds
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[3]
Special mention | Commercial and Financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	16	[3]
Special mention | Purchased Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[3]
Special mention | Lease Financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[3]
Special mention | Property Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	[3]
Special mention | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 0	[3]

[1] Investment-grade loans and leases consist of counterparties with strong credit quality and low expected credit risk and probability of default. Ratings apply to counterparties with a strong capacity to support the timely repayment of any financial commitment.

[2] Speculative loans and leases consist of counterparties that face ongoing uncertainties or exposure to business, financial, or economic downturns. However, these counterparties may have financial flexibility or access to financial alternatives, which allow for financial commitments to be met.

[3] Special mention loans and leases consist of counterparties with potential weaknesses that, if uncorrected, may result in deterioration of repayment prospects.