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Fair Value Disclosures - Financial Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Feb. 28, 2026 | Nov. 30, 2025
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Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | $ 26,469,132 | $ 26,041,216
Counterparty and cash collateral netting, assets | (5,186,913) | (3,705,764)
Securities received as collateral | 393,867 | 200,495
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 14,459,138 | 13,320,152
Counterparty and cash collateral netting, liabilities | (5,600,436) | (3,985,187)
Other secured financings | 424,023 | 425,964
Obligation to return securities received as collateral | 393,867 | 200,495
Long-term debt | 3,686,758 | 3,734,843
Alternative investment | 1,610,326 | 1,681,523
Corporate equity securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 7,912,634 | 8,133,524
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 6,577,363 | 5,619,320
Corporate debt securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 5,451,849 | 5,404,779
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 3,196,612 | 2,765,514
Collateralized debt obligations and collateralized loan obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 653,182 | 685,985
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 1,000 | 627
U.S. government and federal agency securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,592,107 | 2,449,351
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 1,590,162 | 1,913,407
Municipal securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 556,120 | 563,994
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 88 |
Sovereign obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 1,966,403 | 1,676,554
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 1,525,126 | 1,337,119
Residential mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,129,978 | 1,833,755
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 2,041 |
Commercial mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,505 | 10,806
Other asset-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 874,958 | 1,042,475
Loans and other receivables |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,241,450 | 2,239,237
Derivatives |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 1,907,182 | 1,824,082
Investments at fair value |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 180,764 | 176,674
Loans |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 265,759 | 194,148
Derivatives |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 1,300,987 | 1,490,017
Level 1 |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 10,791,789 | 10,868,446
Securities received as collateral | 393,867 | 200,495
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 8,736,189 | 8,281,525
Other secured financings | 0 | 0
Obligation to return securities received as collateral | 393,867 | 200,495
Long-term debt | 0 | 0
Level 1 | Corporate equity securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 7,339,191 | 7,664,824
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 6,457,960 | 5,571,534
Level 1 | Corporate debt securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 | 0
Level 1 | Collateralized debt obligations and collateralized loan obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 | 0
Level 1 | U.S. government and federal agency securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,524,173 | 2,342,718
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 1,590,146 | 1,913,403
Level 1 | Municipal securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 |
Level 1 | Sovereign obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 928,270 | 860,832
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 688,027 | 796,564
Level 1 | Residential mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 |
Level 1 | Commercial mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Level 1 | Other asset-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Level 1 | Loans and other receivables |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Level 1 | Derivatives |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 155 | 72
Level 1 | Investments at fair value |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Level 1 | Loans |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 | 0
Level 1 | Derivatives |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 56 | 24
Level 2 |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 20,015,078 | 18,140,766
Securities received as collateral | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 11,278,489 | 8,964,229
Other secured financings | 412,338 | 412,510
Obligation to return securities received as collateral | 0 | 0
Long-term debt | 2,662,691 | 2,671,485
Level 2 | Corporate equity securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 354,960 | 249,847
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 119,236 | 47,631
Level 2 | Corporate debt securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 5,401,094 | 5,367,201
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 3,196,057 | 2,761,794
Level 2 | Collateralized debt obligations and collateralized loan obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 591,727 | 645,798
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 1,000 | 627
Level 2 | U.S. government and federal agency securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 67,934 | 106,633
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 16 | 4
Level 2 | Municipal securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 556,120 | 563,994
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 88 |
Level 2 | Sovereign obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 1,038,133 | 815,722
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 837,099 | 540,555
Level 2 | Residential mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,123,844 | 1,827,092
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 2,041 |
Level 2 | Commercial mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,150 | 10,458
Level 2 | Other asset-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 630,244 | 909,474
Level 2 | Loans and other receivables |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 2,156,054 | 2,111,517
Level 2 | Derivatives |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 7,079,249 | 5,519,463
Level 2 | Investments at fair value |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 13,569 | 13,567
Level 2 | Loans |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 264,838 | 184,391
Level 2 | Derivatives |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 6,858,114 | 5,429,227
Level 3 |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 849,178 | 737,768
Securities received as collateral | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 44,896 | 59,585
Other secured financings | 11,685 | 13,454
Obligation to return securities received as collateral | 0 | 0
Long-term debt | 1,024,067 | 1,063,358
Level 3 | Corporate equity securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 218,483 | 218,853
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 167 | 155
Level 3 | Corporate debt securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 50,755 | 37,578
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 555 | 3,720
Level 3 | Collateralized debt obligations and collateralized loan obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 61,455 | 40,187
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 | 0
Level 3 | U.S. government and federal agency securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 | 0
Level 3 | Municipal securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 |
Level 3 | Sovereign obligations |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 0 | 0
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 | 0
Level 3 | Residential mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 6,134 | 6,663
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 0 |
Level 3 | Commercial mortgage-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 355 | 348
Level 3 | Other asset-backed securities |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 244,714 | 133,001
Level 3 | Loans and other receivables |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 85,396 | 127,720
Level 3 | Derivatives |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 14,691 | 10,311
Level 3 | Investments at fair value |  |
Financial instruments owned: |  |
Total financial instruments owned, excluding Investments at fair value based on NAV | 167,195 | 163,107
Level 3 | Loans |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 921 | 9,757
Level 3 | Derivatives |  |
Financial instruments sold, not yet purchased: |  |
Financial instruments sold, not yet purchased, at fair value | 43,253 | 45,953
Fair value based on net asset value |  |
Financial instruments sold, not yet purchased: |  |
Alternative investment | $ 1,610,000 | $ 1,680,000

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- Definition The fair value of collateral received by the entity associated with securities borrowed that must be returned if the counterparty fulfills its obligations. It appears on the balance sheet as a liability and has a corresponding asset that appears on the balance sheet called Securities Received as Collateral. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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