Loans and Leases (Recorded Investment in Each Class of Total Loans and Leases by Credit Quality Indicator) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Investment Funds	Dec. 31, 2013 Investment Funds	Jun. 30, 2014 Commercial and Financial	Dec. 31, 2013 Commercial and Financial	Jun. 30, 2014 Purchased Receivables	Dec. 31, 2013 Purchased Receivables	Jun. 30, 2014 Lease Financing	Dec. 31, 2013 Lease Financing	Jun. 30, 2014 Property Development	Dec. 31, 2013 Property Development	Jun. 30, 2014 Other	Dec. 31, 2013 Other	Jun. 30, 2014 Investment grade		Dec. 31, 2013 Investment grade		Jun. 30, 2014 Investment grade Investment Funds		Dec. 31, 2013 Investment grade Investment Funds		Jun. 30, 2014 Investment grade Commercial and Financial		Dec. 31, 2013 Investment grade Commercial and Financial		Mar. 31, 2014 Investment grade Purchased Receivables		Dec. 31, 2013 Investment grade Purchased Receivables		Jun. 30, 2014 Investment grade Lease Financing		Dec. 31, 2013 Investment grade Lease Financing		Jun. 30, 2014 Investment grade Property Development		Dec. 31, 2013 Investment grade Property Development		Mar. 31, 2014 Investment grade Other		Dec. 31, 2013 Investment grade Other		Jun. 30, 2014 Speculative		Dec. 31, 2013 Speculative		Jun. 30, 2014 Speculative Investment Funds		Dec. 31, 2013 Speculative Investment Funds		Jun. 30, 2014 Speculative Commercial and Financial	Dec. 31, 2013 Speculative Commercial and Financial		Jun. 30, 2014 Speculative Purchased Receivables		Dec. 31, 2013 Speculative Purchased Receivables		Jun. 30, 2014 Speculative Lease Financing		Dec. 31, 2013 Speculative Lease Financing		Jun. 30, 2014 Speculative Property Development		Dec. 31, 2013 Speculative Property Development		Jun. 30, 2014 Speculative Other		Dec. 31, 2013 Speculative Other		Dec. 31, 2013 Special mention		Dec. 31, 2013 Special mention Investment Funds		Dec. 31, 2013 Special mention Commercial and Financial		Dec. 31, 2013 Special mention Purchased Receivables		Dec. 31, 2013 Special mention Lease Financing		Dec. 31, 2013 Special mention Property Development		Dec. 31, 2013 Special mention Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	$ 16,799	$ 13,486	$ 12,836	$ 10,413	$ 2,427	$ 1,526	$ 201	$ 243	$ 1,072	$ 1,095	$ 234	$ 180	$ 29	$ 29	$ 14,390	[1]	$ 12,362	[1]	$ 12,236	[1]	$ 10,282	[1]	$ 892	[1]	$ 740	[1]	$ 201	[1]	$ 243	[1]	$ 1,032	[1]	$ 1,068	[1]	$ 0	[1]	$ 0	[1]	$ 29	[1]	$ 29	[1]	$ 2,409	[2]	$ 1,108	[2]	$ 600	[2]	$ 131	[2]	$ 1,535	$ 770	[2]	$ 0	[2]	$ 0	[2]	$ 40	[2]	$ 27	[2]	$ 234	[2]	$ 180	[2]	$ 0	[2]	$ 0	[2]	$ 16	[3]	$ 0	[3]	$ 16	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 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.