Derivative Financial Instruments - Unrealized and Realized Gains (Losses) on Derivative Contracts (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	$ (185,896)	$ 91,718	$ (588,851)	$ 73,873
Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(16,631)	25,308	(96,715)	580
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	7,886	6,893	14,000	30,417
Equity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(185,264)	68,649	(509,476)	28,008
Commodity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	4,089	(4,757)	1,899	15,480
Credit contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	$ 4,024	$ (4,375)	$ 1,441	$ (612)