Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Nov. 30, 2018
Securities borrowing arrangements
Gross Amounts	$ 7,895,149	$ 6,538,212
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	7,895,149	6,538,212
Additional Amounts Available for Setoff	(707,436)	(468,778)
Available Collateral	(1,653,688)	(1,193,986)
Net Amount	5,534,025	4,875,448
Reverse repurchase agreements
Gross Amounts	17,586,096	11,336,175
Netting in Consolidated Statement of Financial Condition	(13,086,101)	(8,550,417)
Net Amounts in Consolidated Statement of Financial Condition	4,499,995	2,785,758
Additional Amounts Available for Setoff	(454,507)	(609,225)
Available Collateral	(3,817,544)	(2,126,730)
Net Amount	227,944	49,803
Securities lending arrangements
Gross Amounts	2,182,865	1,838,688
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	2,182,865	1,838,688
Additional Amounts Available for Setoff	(707,436)	(468,778)
Available Collateral	(1,452,911)	(1,343,704)
Net Amount	22,518	26,206
Repurchase agreements
Gross Amounts	21,323,082	17,193,486
Netting in Consolidated Statement of Financial Condition	(13,086,101)	(8,550,417)
Net Amounts in Consolidated Statement of Financial Condition	8,236,981	8,643,069
Additional Amounts Available for Setoff	(454,507)	(609,225)
Available Collateral	(6,269,894)	(7,070,967)
Net Amount	1,512,580	962,877
Securities borrowing arrangements	5,473,000	4,825,700
Securities borrowing arrangements, collateral	5,322,700	4,711,700
Securities borrowing arrangements, repurchase agreements	382,900	931,700
Securities borrowing arrangements, repurchase agreements, pledged securities collateral	$ 392,400	$ 963,600