Collateralized Transactions (Offsetting of Securities Financing Agreements) (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019
Securities borrowing arrangements, Assets
Gross Amounts	$ 6,708,788	$ 7,624,642
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	6,708,788	7,624,642
Additional Amounts Available for Setoff	(418,602)	(361,394)
Available Collateral	(1,250,215)	(1,479,433)
Net Amount	5,039,971	5,783,815
Reverse repurchase agreements, Assets
Gross Amounts	14,723,575	15,551,845
Netting in Consolidated Statements of Financial Condition	(9,816,544)	(11,252,247)
Net Amounts in Consolidated Statements of Financial Condition	4,907,031	4,299,598
Additional Amounts Available for Setoff	(617,398)	(291,316)
Available Collateral	(4,260,370)	(3,929,977)
Net Amount	29,263	78,305
Securities received as collateral	15,004	9,500
Securities lending arrangements, Liabilities
Gross Amounts	1,891,912	1,525,140
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	1,891,912	1,525,140
Additional Amounts Available for Setoff	(418,602)	(361,394)
Available Collateral	(1,437,709)	(970,799)
Net Amount	35,601	192,947
Repurchase agreements, Liabilities
Gross Amounts	18,222,566	18,756,917
Netting in Consolidated Statements of Financial Condition	(9,816,544)	(11,252,247)
Net Amounts in Consolidated Statements of Financial Condition	8,406,022	7,504,670
Additional Amounts Available for Setoff	(617,398)	(291,316)
Available Collateral	(7,192,406)	(6,663,807)
Net Amount	596,218	549,547
Obligation to return securities received as collateral	15,004	9,500
Securities borrowing agreement, subject to review	4,981,100	5,683,400
Securities borrowing agreement, collateral received, subject to review	4,841,000	5,523,600
Repurchase agreement, net amount, subject to review	551,100	439,700
Repurchase agreements, collateral pledged, subject to review	$ 563,400	$ 447,500