Variable Interest Entities - Assets and Liabilities of Consolidated VIEs Prior to Consolidation (Detail) (USD $)	May 31, 2014	Nov. 30, 2013
Variable Interest Entity [Line Items]
Cash	$ 3,958,288,000	$ 3,561,119,000
Financial instruments owned	17,143,518,000	16,650,043,000
Securities purchased under agreement to resell	4,609,422,000	3,746,920,000
Other assets	1,158,780,000	1,130,136,000
Total assets	43,609,986,000	40,176,996,000
Total liabilities	38,082,885,000	34,755,322,000
Securitization Vehicles [Member]
Variable Interest Entity [Line Items]
Financial instruments owned		97,500,000
Securities purchased under agreement to resell	220,000,000	195,100,000
Other assets		2,300,000
Total assets	220,000,000	294,900,000
Other secured financings	220,000,000	292,500,000
Other liabilities		2,100,000
Total liabilities	220,000,000	294,600,000
Other [Member]
Variable Interest Entity [Line Items]
Cash	200,000	200,000
Financial instruments owned	400,000	400,000
Total assets	600,000	600,000
Other liabilities	200,000	200,000
Total liabilities	$ 200,000	$ 200,000