Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (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
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss				$ 1,289	$ 7,781
Goodwill, carrying value			$ 1,662,636	1,656,588	1,662,636	$ 1,722,346
Goodwill impairment				0	54,000
Exchange and clearing organization membership interests and registrations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss	$ 1,300	$ 178		1,289	178
Customer relationships [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss				0	7,603
Futures Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss			7,500
Goodwill impairment					51,900
International Asset Management Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss			100
Goodwill impairment					2,100
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value			0		0
Goodwill impairment					51,900
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value			0		0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value			0		0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, carrying value			5,608	4,178	5,608
Exchange ownership interest, impairment loss				1,289	178
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member] | Other Expenses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, impairment loss				1,300	200
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, fair value			5,608	4,178	5,608
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Exchange and clearing organization membership interests and registrations [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange ownership interest, fair value			0	$ 0	0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, carrying value			0		0
Intangible assets, impairment loss					7,534
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member] | Other Expenses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, impairment loss					7,500
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, carrying value			0		0
Fair Value, Measurements, Nonrecurring [Member] | Futures Reporting Unit [Member] | Customer relationships [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, carrying value			0		0
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value			0		0
Goodwill impairment					2,100
Intangible assets, carrying value			0		0
Intangible assets, impairment loss					60
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member] | Other Expenses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets, impairment loss					100
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value			0		0
Intangible assets, carrying value			0		0
Fair Value, Measurements, Nonrecurring [Member] | International Asset Management Reporting Unit [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, carrying value			0		0
Intangible assets, carrying value			$ 0		$ 0