Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Basis of Presentation (Details)	3 Months Ended		3 Months Ended	0 Months Ended	3 Months Ended
Basis of Presentation (Details)	Mar. 31, 2013 item	Mar. 17, 2014 employee	Jun. 30, 2013 Exit of Fixed Income and Investment Banking businesses employee	Aug. 22, 2011 Equities business employee	Sep. 30, 2011 Equities business employee
Basis of Presentation
Number of principal business units	3
Basis of Presentation
Number of employees impacted			150	62	62
Number of employees		13