Collateralized Transactions - Collateral Pledged (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	$ 1,891,912	$ 1,525,140
Repurchase Agreements	18,222,566	18,756,917
Obligation To Return Securities Received As Collateral	15,004	9,500
Total	20,129,482	20,291,557
Corporate equity securities
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	1,682,285	1,314,395
Repurchase Agreements	328,156	129,558
Obligation To Return Securities Received As Collateral	5,096	0
Total	2,015,537	1,443,953
Corporate debt securities
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	203,091	191,311
Repurchase Agreements	2,031,185	1,730,526
Obligation To Return Securities Received As Collateral	0	0
Total	2,234,276	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	1,558,094	1,745,145
Obligation To Return Securities Received As Collateral	0	0
Total	1,558,094	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	6,536	19,434
Repurchase Agreements	10,239,853	10,863,997
Obligation To Return Securities Received As Collateral	9,908	9,500
Total	10,256,297	10,892,931
Municipal securities
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	0	0
Repurchase Agreements	234,681	498,202
Obligation To Return Securities Received As Collateral	0	0
Total	234,681	498,202
Sovereign obligations
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities Lending Arrangements	0	0
Repurchase Agreements	2,640,873	3,016,563
Obligation To Return Securities Received As Collateral	0	0
Total	2,640,873	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	1,189,724	772,926
Obligation To Return Securities Received As Collateral	0	0
Total	$ 1,189,724	$ 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
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 30
-Section 50
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