Loans and Leases (Net Loans) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	$ 15,578	$ 12,307
Allowance for loan losses	(22)	(22)
Loans and leases, net of allowance for loan losses	15,556	12,285
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	166	411
Institutional
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans and leases	15,412	11,896
U.S. \| Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial real estate	166	411
U.S. \| Institutional
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment funds	10,017	8,376
Commercial and financial	1,486	613
Purchased receivables	231	276
Lease financing	357	380
Non-U.S. \| Institutional
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment funds	1,998	829
Commercial and financial	509	520
Purchased receivables	60	118
Lease financing	$ 754	$ 784

Amount before allowance of commercial leases and leveraged lease transactions where the entity is long-term creditor. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes leases covered under loss sharing agreements.

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+ Details

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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+ Details

- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References+ Details

- Definition

Amount before allowance of loans issued to financial institutions, including, but not limited to, real estate investment trusts, mortgage companies, and banks. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References+ Details

- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

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+ Details