Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Nov. 30, 2019
Securities borrowing arrangements
Gross Amounts	$ 7,268,413	$ 7,624,642
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	7,268,413	7,624,642
Additional Amounts Available for Setoff	(429,615)	(361,394)
Available Collateral	(1,691,674)	(1,479,433)
Net Amount	5,147,124	5,783,815
Reverse repurchase agreements
Gross Amounts	17,905,457	15,551,845
Netting in Consolidated Statement of Financial Condition	(12,578,066)	(11,252,247)
Net Amounts in Consolidated Statement of Financial Condition	5,327,391	4,299,598
Additional Amounts Available for Setoff	(144,353)	(291,316)
Available Collateral	(5,141,297)	(3,929,977)
Net Amount	41,741	78,305
Securities received as collateral, at fair value	4,413	9,500
Securities lending arrangements
Gross Amounts	1,929,737	1,525,140
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	1,929,737	1,525,140
Additional Amounts Available for Setoff	(429,615)	(361,394)
Available Collateral	(1,467,230)	(970,799)
Net Amount	32,892	192,947
Repurchase agreements
Gross Amounts	19,837,038	18,756,917
Netting in Consolidated Statement of Financial Condition	(12,578,066)	(11,252,247)
Net Amounts in Consolidated Statement of Financial Condition	7,258,972	7,504,670
Additional Amounts Available for Setoff	(144,353)	(291,316)
Available Collateral	(6,622,623)	(6,663,807)
Net Amount	491,996	549,547
Obligation to return securities received as collateral, at fair value	4,413	9,500
Securities borrowing arrangements	5,089,000	5,683,400
Securities borrowing arrangements, collateral	4,921,200	5,523,600
Securities borrowing arrangements, repurchase agreements	439,700	439,700
Securities borrowing arrangements, repurchase agreements, pledged securities collateral	$ 451,600	$ 447,500