Goodwill and Other Intangible Assets - Schedule of Goodwill Resulting from Leucadia Transaction Attributable to Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2015	Nov. 30, 2014
Goodwill [Roll Forward]
Total goodwill	$ 1,662,636
Add: Translation adjustments	(1,252)
Total goodwill	1,661,384
Capital Markets [Member]
Goodwill [Roll Forward]
Total goodwill		1,659,636
Total goodwill	1,658,384	1,659,636
Asset Management [Member]
Goodwill [Roll Forward]
Total goodwill		3,000
Total goodwill	$ 3,000	$ 3,000