Derivative Financial Instruments - Unrealized and Realized Gains (Losses) on Derivative Contracts (Detail) - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	$ (311,366)	$ 51,869
Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(72,525)	(42,793)
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	1,589	15,172
Equity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(225,666)	71,041
Commodity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(1,875)	14,491
Credit contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	$ (12,889)	$ (6,042)