Collateralized Transactions - Contractual Maturity (Details) - USD ($) $ in Thousands	Feb. 28, 2017	Nov. 30, 2016
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	$ 2,522,846	$ 2,819,132
Repurchase Agreements	16,400,889	17,012,332
Total	18,923,735	19,831,464
Overnight and Continuous [Member]
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	1,250,755	2,131,891
Repurchase Agreements	8,906,185	9,147,176
Total	10,156,940	11,279,067
Up to 30 Days [Member]
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	0	39,673
Repurchase Agreements	2,321,184	2,008,119
Total	2,321,184	2,047,792
30-90 Days [Member]
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	712,777	104,516
Repurchase Agreements	3,651,291	3,809,533
Total	4,364,068	3,914,049
Greater than 90 Days [Member]
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	559,314	543,052
Repurchase Agreements	1,522,229	2,047,504
Total	$ 2,081,543	$ 2,590,556