Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	May 31, 2014	Nov. 30, 2013	Feb. 28, 2013
Business Combination Transactions [Line Items]
Total goodwill	$ 1,725,117	$ 1,722,346	$ 1,700,000
Capital Markets [Member]
Business Combination Transactions [Line Items]
Total goodwill	1,720,017	1,717,246
Asset Management [Member]
Business Combination Transactions [Line Items]
Total goodwill	$ 5,100	$ 5,100