Collateralized Transactions - Collateral Pledged (Details) - USD ($) $ in Thousands	Nov. 30, 2020	Nov. 30, 2019
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	$ 1,810,748	$ 1,525,140
Repurchase Agreements	15,159,273	18,756,917
Obligation To Return Securities Received As Collateral, at fair value	7,517	9,500
Total	16,977,538	20,291,557
Corporate equity securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	1,371,978	1,314,395
Repurchase Agreements	157,912	129,558
Obligation To Return Securities Received As Collateral, at fair value	7,517	0
Total	1,537,407	1,443,953
Corporate debt securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	369,218	191,311
Repurchase Agreements	1,869,844	1,730,526
Obligation To Return Securities Received As Collateral, at fair value	0	0
Total	2,239,062	1,921,837
Mortgage-backed and asset-backed securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	0	0
Repurchase Agreements	1,547,140	1,745,145
Obligation To Return Securities Received As Collateral, at fair value	0	0
Total	1,547,140	1,745,145
U.S. government and federal agency securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	14,789	19,434
Repurchase Agreements	7,149,992	10,863,997
Obligation To Return Securities Received As Collateral, at fair value	0	9,500
Total	7,164,781	10,892,931
Municipal securities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	0	0
Repurchase Agreements	278,470	498,202
Obligation To Return Securities Received As Collateral, at fair value	0	0
Total	278,470	498,202
Sovereign obligations
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	54,763	0
Repurchase Agreements	2,763,032	3,016,563
Obligation To Return Securities Received As Collateral, at fair value	0	0
Total	2,817,795	3,016,563
Loans and other receivables
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities Lending Arrangements	0	0
Repurchase Agreements	1,392,883	772,926
Obligation To Return Securities Received As Collateral, at fair value	0	0
Total	$ 1,392,883	$ 772,926

Amount, after effects of master netting arrangements, of derivative liabilities, securities sold under agreements to repurchase and securities loaned offset against a right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, before effects of master netting arrangements, of financial assets loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and financial assets transferred other than securities that qualify as secured borrowings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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