Schedule I (PARENT COMPANY ONLY) (CONDENSED STATEMENTS OF FINANCIAL CONDITION) (Details) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015
ASSETS
Cash and cash equivalents	$ 3,529,069	$ 3,510,163
Cash and securities segregated and on deposited for regulatory purposes or deposited with clearing and depository organizations	857,337	751,084
Financial instruments owned, at fair value	13,809,512	16,559,116
Investments in managed funds	186,508	85,775
Loans to and investments in related parties	38,400	28,300
Investment in subsidiaries	653,872	825,908
Other assets	1,229,551	1,072,411
Total assets	36,941,276	38,563,972
LIABILITIES AND EQUITY
Short-term borrowings	525,842	310,659
Financial instruments sold, not yet purchased, at fair value	8,359,202	6,785,064
Accrued expenses and other liabilities	1,248,200	1,049,019
Long-term debt	5,483,355	5,640,722
Total liabilities	31,570,679	33,054,595
EQUITY
Member’s paid-in capital	5,538,103	5,526,855
Accumulated other comprehensive loss:
Currency translation adjustments	(152,305)	(36,811)
Changes in instrument specific credit risk	(6,494)	0
Additional minimum pension liability	(9,358)	(8,135)
Total accumulated other comprehensive loss	(168,157)	(44,946)
Total member’s equity	5,369,946	5,481,909
Total liabilities and equity	36,941,276	38,563,972
Parent Company [Member]
ASSETS
Cash and cash equivalents	1,178,475	824,239
Cash and securities segregated and on deposited for regulatory purposes or deposited with clearing and depository organizations	36,148	66,203
Financial instruments owned, at fair value	130,116	138,820
Investments in managed funds	34,170	34,933
Loans to and investments in related parties	473,912	520,550
Investment in subsidiaries	4,757,824	4,892,454
Advances to subsidiaries	1,262,211	1,423,175
Subordinated notes receivable	2,802,440	2,924,479
Other assets	569,291	590,581
Total assets	11,244,587	11,415,434
LIABILITIES AND EQUITY
Short-term borrowings	96,456	0
Financial instruments sold, not yet purchased, at fair value	7,285	21,024
Accrued expenses and other liabilities	287,545	271,779
Long-term debt	5,483,355	5,640,722
Total liabilities	5,874,641	5,933,525
EQUITY
Member’s paid-in capital	5,538,103	5,526,855
Accumulated other comprehensive loss:
Currency translation adjustments	(152,305)	(36,811)
Changes in instrument specific credit risk	(6,494)	0
Additional minimum pension liability	(9,358)	(8,135)
Total accumulated other comprehensive loss	(168,157)	(44,946)
Total member’s equity	5,369,946	5,481,909
Total liabilities and equity	$ 11,244,587	$ 11,415,434