Loans and Leases (Schedule of Activity In The Allowance For Loan Losses) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 32		$ 22	$ 28		$ 22
Allowance for Loan and Lease Losses, Write-offs	0		0	0		0
Provisions	2		0	6		0
Financing Receivable, Allowance for Credit Losses, Recovery	0		0	0		0
Ending balance	34	[1]	22	34	[1]	22
Institutional
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	32		22	28		22
Allowance for Loan and Lease Losses, Write-offs	0		0	0		0
Provisions	0		0	0		0
Financing Receivable, Allowance for Credit Losses, Recovery	2		0	6		0
Ending balance	34	[1]	22	34	[1]	22
Commercial Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0		0	0		0
Allowance for Loan and Lease Losses, Write-offs	0		0	0		0
Provisions	0		0	0		0
Financing Receivable, Allowance for Credit Losses, Recovery	0		0	0		0
Ending balance	$ 0	[1]	$ 0	$ 0	[1]	$ 0

[1] As of September 30, 2014, approximately $22 million of our allowance for loan losses was related to senior secured bank loans included in the institutional segment; the remaining $12 million was related to other commercial-and-financial loans in the institutional segment.