Collateralized Transactions (Offsetting of Securities Financing Agreements) (Details) - USD ($) $ in Thousands	May 31, 2019	Nov. 30, 2018
Securities borrowing arrangements, Assets
Gross Amounts	$ 7,713,886	$ 6,538,212
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	7,713,886	6,538,212
Additional Amounts Available for Setoff	(570,248)	(468,778)
Available Collateral	(1,585,821)	(1,193,986)
Net Amount	5,557,817	4,875,448
Reverse repurchase agreements, Assets
Gross Amounts	16,259,065	11,336,175
Netting in Consolidated Statements of Financial Condition	(12,231,733)	(8,550,417)
Net Amounts in Consolidated Statements of Financial Condition	4,027,332	2,785,758
Additional Amounts Available for Setoff	(526,433)	(609,225)
Available Collateral	(3,452,962)	(2,126,730)
Net Amount	47,937	49,803
Securities lending arrangements, Liabilities
Gross Amounts	2,327,805	1,838,688
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	2,327,805	1,838,688
Additional Amounts Available for Setoff	(570,248)	(468,778)
Available Collateral	(1,694,029)	(1,343,704)
Net Amount	63,528	26,206
Repurchase agreements, Liabilities
Gross Amounts	21,093,190	17,193,486
Netting in Consolidated Statements of Financial Condition	(12,231,733)	(8,550,417)
Net Amounts in Consolidated Statements of Financial Condition	8,861,457	8,643,069
Additional Amounts Available for Setoff	(526,433)	(609,225)
Available Collateral	(7,103,993)	(7,070,967)
Net Amount	1,231,031	962,877
Securities borrowing agreement, subject to review	5,469,000	4,825,700
Securities borrowing agreement, collateral received, subject to review	5,273,800	4,711,700
Repurchase agreement, net amount, subject to review	1,119,300	931,700
Repurchase agreements, collateral pledged, subject to review	$ 1,147,800	$ 963,600