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Derivative Financial Instruments - Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract (Details) $ in Thousands | May 31, 2025 USD ($) Contract | Nov. 30, 2024 USD ($) Contract
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Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Financial instruments owned | Financial instruments owned
Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Financial instruments sold, not yet purchased, at fair value | Financial instruments sold, not yet purchased, at fair value
Net amounts per consolidated statements of financial condition, assets | $ 1,288,486 | $ 517,775
Net amounts per consolidated statements of financial condition, liabilities | 722,726 | 710,314
Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 1,816,106 | 682,622
Fair value, liabilities | 1,024,054 | 521,919
Amounts offset in the consolidated statements of financial condition, assets | (981,970) | (476,364)
Amounts offset in the consolidated statements of financial condition, liabilities | (981,970) | (476,364)
Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 333,105 | 1,065,726
Fair value, liabilities | 342,578 | 1,069,382
Amounts offset in the consolidated statements of financial condition, assets | (330,271) | (1,058,995)
Amounts offset in the consolidated statements of financial condition, liabilities | (339,425) | (1,066,232)
Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 1,855,093 | 1,437,178
Fair value, liabilities | 2,443,572 | 1,912,726
Amounts offset in the consolidated statements of financial condition, assets | (1,403,577) | (1,132,392)
Amounts offset in the consolidated statements of financial condition, liabilities | (1,766,083) | (1,251,117)
Derivatives designated as accounting hedges: |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 3,574 | 45,299
Fair value, liabilities | 55,950 | 0
Derivatives designated as accounting hedges: | Interest rate contracts: | Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,712 | $ 3,396
Number of contracts, assets | Contract | 3 | 3
Fair value, liabilities | $ 0 | $ 0
Number of contracts, liabilities | Contract | 0 | 0
Derivatives designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,862 | $ 41,903
Number of contracts, assets | Contract | 1 | 3
Fair value, liabilities | $ 55,950 | $ 0
Number of contracts, liabilities | Contract | 3 | 0
Derivatives not designated as accounting hedges: |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 4,000,730 | $ 3,140,227
Fair value, liabilities | 3,754,254 | 3,504,027
Derivatives not designated as accounting hedges: | Interest rate contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 536 | $ 273
Number of contracts, assets | Contract | 46,274 | 16,548
Fair value, liabilities | $ 0 | $ 13
Number of contracts, liabilities | Contract | 23,687 | 32,984
Derivatives not designated as accounting hedges: | Interest rate contracts: | Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 329,900 | $ 1,030,842
Number of contracts, assets | Contract | 7,826 | 6,663
Fair value, liabilities | $ 331,751 | $ 1,030,671
Number of contracts, liabilities | Contract | 8,253 | 6,891
Derivatives not designated as accounting hedges: | Interest rate contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 329,124 | $ 365,678
Number of contracts, assets | Contract | 1,167 | 1,096
Fair value, liabilities | $ 682,976 | $ 717,255
Number of contracts, liabilities | Contract | 1,365 | 1,256
Derivatives not designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 161,844 | $ 132,240
Number of contracts, assets | Contract | 37,567 | 57,786
Fair value, liabilities | $ 136,950 | $ 138,608
Number of contracts, liabilities | Contract | 12,957 | 35,545
Derivatives not designated as accounting hedges: | Equity contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,815,569 | $ 682,327
Number of contracts, assets | Contract | 2,837,638 | 1,777,822
Fair value, liabilities | $ 1,023,820 | $ 521,889
Number of contracts, liabilities | Contract | 1,617,971 | 1,574,498
Derivatives not designated as accounting hedges: | Equity contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,293,083 | $ 855,169
Number of contracts, assets | Contract | 34,451 | 33,516
Fair value, liabilities | $ 1,521,811 | $ 1,024,129
Number of contracts, liabilities | Contract | 32,884 | 20,587
Derivatives not designated as accounting hedges: | Commodity contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1 | $ 22
Number of contracts, assets | Contract | 903 | 806
Fair value, liabilities | $ 234 | $ 17
Number of contracts, liabilities | Contract | 823 | 697
Derivatives not designated as accounting hedges: | Commodity contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 4,252 | $ 4,570
Number of contracts, assets | Contract | 9,900 | 11,691
Fair value, liabilities | $ 1,475 | $ 1,381
Number of contracts, liabilities | Contract | 4,372 | 5,180
Derivatives not designated as accounting hedges: | Credit contracts: | Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,493 | $ 31,488
Number of contracts, assets | Contract | 52 | 66
Fair value, liabilities | $ 10,827 | $ 38,711
Number of contracts, liabilities | Contract | 6 | 32
Derivatives not designated as accounting hedges: | Credit contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 64,928 | $ 37,618
Number of contracts, assets | Contract | 9 | 16
Fair value, liabilities | $ 44,410 | $ 31,353
Number of contracts, liabilities | Contract | 23 | 32

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