Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands			3 Months Ended	12 Months Ended
	Aug. 01, 2015	Aug. 01, 2014	Nov. 30, 2014	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 1,662,636	$ 1,656,588	$ 1,662,636	$ 1,722,346
Impairment losses				1,289	7,781
Exchange and clearing organization membership interests and registrations [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment losses	$ 1,300	$ 178		1,289	178
Capital Markets [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill			1,659,636	$ 1,653,588	$ 1,659,636
Futures Reporting Unit [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment losses			7,500
International Asset Management Reporting Unit [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment losses			$ 100