Fair Value (Level 3 Total Realized And Unrealized Gains And Losses Recorded In Revenue) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total Revenue [Member]
Realized and Unrealized Gains and Losses [Line Items]
Total Realized and Unrealized Gains (Losses) Recorded in Revenue	$ 125	$ 429	$ 548
Change in Unrealized Gains (Losses) Related to Financial Instruments Held	(1)	3	(9)
Trading services
Realized and Unrealized Gains and Losses [Line Items]
Total Realized and Unrealized Gains (Losses) Recorded in Revenue	63	9	(13)
Change in Unrealized Gains (Losses) Related to Financial Instruments Held	(1)	3	(9)
Total fee revenue
Realized and Unrealized Gains and Losses [Line Items]
Total Realized and Unrealized Gains (Losses) Recorded in Revenue	63	9	(13)
Change in Unrealized Gains (Losses) Related to Financial Instruments Held	(1)	3	(9)
Net interest revenue
Realized and Unrealized Gains and Losses [Line Items]
Total Realized and Unrealized Gains (Losses) Recorded in Revenue	62	420	561
Change in Unrealized Gains (Losses) Related to Financial Instruments Held	$ 0	$ 0	$ 0