Segment and Geographic Information (Net Revenues by Geographic Area) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information
Net Revenues	$ 7,792	$ 9,907
Americas
Segment Reporting Information
Net Revenues	5,752	6,930
EMEA
Segment Reporting Information
Net Revenues	1,129	1,762
Asia-Pacific
Segment Reporting Information
Net Revenues	$ 911	$ 1,215

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income after deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

No definition available.

Name:	us-gaap_RevenuesNetOfInterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration