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Derivative Financial Instruments - Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract (Details) $ in Thousands | Feb. 28, 2026 USD ($) Contract | Nov. 30, 2025 USD ($) 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 | $ 1,907,182 | $ 1,824,082
Net amounts per consolidated statements of financial condition, liabilities | 1,300,987 | 1,490,017
Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 2,556,942 | 2,777,285
Fair value, liabilities | 1,875,509 | 2,156,827
Amounts offset in the consolidated statements of financial condition, assets | (1,318,353) | (1,600,969)
Amounts offset in the consolidated statements of financial condition, liabilities | (1,318,353) | (1,600,969)
Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 2,336,650 | 816,969
Fair value, liabilities | 2,362,314 | 824,438
Amounts offset in the consolidated statements of financial condition, assets | (2,335,539) | (815,810)
Amounts offset in the consolidated statements of financial condition, liabilities | (2,338,936) | (819,548)
Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 2,200,503 | 1,935,592
Fair value, liabilities | 2,663,600 | 2,493,939
Amounts offset in the consolidated statements of financial condition, assets | (1,533,021) | (1,288,985)
Amounts offset in the consolidated statements of financial condition, liabilities | (1,943,147) | (1,564,670)
Derivatives designated as accounting hedges: |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | 13,964 | 40,444
Fair value, liabilities | 3,799 | 3,093
Derivatives designated as accounting hedges: | Interest rate contracts: | Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 3,515 | $ 0
Number of contracts, assets | Contract | 3 | 0
Fair value, liabilities | $ 1,256 | $ 2,519
Number of contracts, liabilities | Contract | 1 | 4
Derivatives designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 10,449 | $ 40,444
Number of contracts, assets | Contract | 5 | 7
Fair value, liabilities | $ 2,543 | $ 574
Number of contracts, liabilities | Contract | 6 | 2
Derivatives not designated as accounting hedges: |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 7,080,131 | $ 5,489,402
Fair value, liabilities | 6,897,624 | 5,472,111
Derivatives not designated as accounting hedges: | Interest rate contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 529 | $ 232
Number of contracts, assets | Contract | 44,784 | 33,107
Fair value, liabilities | $ 56 | $ 24
Number of contracts, liabilities | Contract | 48,774 | 36,811
Derivatives not designated as accounting hedges: | Interest rate contracts: | Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 2,331,733 | $ 806,009
Number of contracts, assets | Contract | 8,403 | 8,148
Fair value, liabilities | $ 2,356,258 | $ 804,799
Number of contracts, liabilities | Contract | 8,865 | 8,325
Derivatives not designated as accounting hedges: | Interest rate contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 267,009 | $ 285,053
Number of contracts, assets | Contract | 1,702 | 1,576
Fair value, liabilities | $ 577,234 | $ 614,104
Number of contracts, liabilities | Contract | 683 | 823
Derivatives not designated as accounting hedges: | Foreign exchange contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 0 |
Number of contracts, assets | Contract | 36 |
Fair value, liabilities | $ 0 |
Number of contracts, liabilities | Contract | 22 |
Derivatives not designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 149,495 | $ 115,068
Number of contracts, assets | Contract | 35,501 | 34,418
Fair value, liabilities | $ 118,551 | $ 103,297
Number of contracts, liabilities | Contract | 10,816 | 12,028
Derivatives not designated as accounting hedges: | Equity contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 2,553,216 | $ 2,776,601
Number of contracts, assets | Contract | 3,135,250 | 3,275,468
Fair value, liabilities | $ 1,875,392 | $ 2,156,730
Number of contracts, liabilities | Contract | 2,233,288 | 2,298,561
Derivatives not designated as accounting hedges: | Equity contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,693,580 | $ 1,367,089
Number of contracts, assets | Contract | 53,207 | 57,254
Fair value, liabilities | $ 1,901,935 | $ 1,670,215
Number of contracts, liabilities | Contract | 44,644 | 36,481
Derivatives not designated as accounting hedges: | Commodity contracts: | Exchange-traded |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 3,197 | $ 452
Number of contracts, assets | Contract | 431 | 627
Fair value, liabilities | $ 61 | $ 73
Number of contracts, liabilities | Contract | 427 | 668
Derivatives not designated as accounting hedges: | Commodity contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 4,445 | $ 6,381
Number of contracts, assets | Contract | 7,198 | 18,497
Fair value, liabilities | $ 9,626 | $ 7,293
Number of contracts, liabilities | Contract | 8,209 | 15,417
Derivatives not designated as accounting hedges: | Credit contracts: | Cleared OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 1,402 | $ 10,960
Number of contracts, assets | Contract | 71 | 58
Fair value, liabilities | $ 4,800 | $ 17,120
Number of contracts, liabilities | Contract | 10 | 13
Derivatives not designated as accounting hedges: | Credit contracts: | Bilateral OTC |  |
Derivatives, Fair Value [Line Items] |  |
Fair value, assets | $ 75,525 | $ 121,557
Number of contracts, assets | Contract | 33 | 17
Fair value, liabilities | $ 53,711 | $ 98,456
Number of contracts, liabilities | Contract | 19 | 15

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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