v3.26.3
Derivative Financial Instruments - Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract (Details)
$ in Thousands
Aug. 31, 2026
USD ($)
Contract
Nov. 30, 2025
USD ($)
Contract
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 $ 949,283 $ 1,824,082
Net amounts per consolidated statements of financial condition, liabilities 1,242,427 1,490,017
Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets 1,440,133 2,777,285
Fair value, liabilities 1,211,245 2,156,827
Amounts offset in the consolidated statements of financial condition, assets (878,475) (1,600,969)
Amounts offset in the consolidated statements of financial condition, liabilities (878,475) (1,600,969)
Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets 1,081,512 816,969
Fair value, liabilities 1,070,696 824,438
Amounts offset in the consolidated statements of financial condition, assets (1,067,959) (815,810)
Amounts offset in the consolidated statements of financial condition, liabilities (1,070,696) (819,548)
Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets 2,503,153 1,935,592
Fair value, liabilities 3,276,623 2,493,939
Amounts offset in the consolidated statements of financial condition, assets (2,129,081) (1,288,985)
Amounts offset in the consolidated statements of financial condition, liabilities (2,366,966) (1,564,670)
Derivatives designated as accounting hedges:    
Derivatives, Fair Value [Line Items]    
Fair value, assets 1,415 40,444
Fair value, liabilities 44,535 3,093
Derivatives designated as accounting hedges: | Interest rate contracts: | Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 0 $ 0
Number of contracts, assets | Contract 0 0
Fair value, liabilities $ 910 $ 2,519
Number of contracts, liabilities | Contract 3 4
Derivatives designated as accounting hedges: | Interest rate contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 346  
Number of contracts, assets | Contract 1  
Fair value, liabilities $ 0  
Number of contracts, liabilities | Contract 0  
Derivatives designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 1,069 $ 40,444
Number of contracts, assets | Contract 1 7
Fair value, liabilities $ 43,625 $ 574
Number of contracts, liabilities | Contract 17 2
Derivatives not designated as accounting hedges:    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 5,023,383 $ 5,489,402
Fair value, liabilities 5,514,029 5,472,111
Derivatives not designated as accounting hedges: | Interest rate contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 876 $ 232
Number of contracts, assets | Contract 4,273 33,107
Fair value, liabilities $ 233 $ 24
Number of contracts, liabilities | Contract 15,193 36,811
Derivatives not designated as accounting hedges: | Interest rate contracts: | Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 1,073,315 $ 806,009
Number of contracts, assets | Contract 9,404 8,148
Fair value, liabilities $ 1,059,366 $ 804,799
Number of contracts, liabilities | Contract 9,147 8,325
Derivatives not designated as accounting hedges: | Interest rate contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 267,397 $ 285,053
Number of contracts, assets | Contract 745 1,576
Fair value, liabilities $ 800,746 $ 614,104
Number of contracts, liabilities | Contract 1,533 823
Derivatives not designated as accounting hedges: | Foreign exchange contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 885  
Number of contracts, assets | Contract 627  
Fair value, liabilities $ 641  
Number of contracts, liabilities | Contract 1,879  
Derivatives not designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 155,131 $ 115,068
Number of contracts, assets | Contract 32,332 34,418
Fair value, liabilities $ 109,282 $ 103,297
Number of contracts, liabilities | Contract 11,914 12,028
Derivatives not designated as accounting hedges: | Equity contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 1,438,125 $ 2,776,601
Number of contracts, assets | Contract 2,277,967 3,275,468
Fair value, liabilities $ 1,209,793 $ 2,156,730
Number of contracts, liabilities | Contract 1,411,012 2,298,561
Derivatives not designated as accounting hedges: | Equity contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 2,044,367 $ 1,367,089
Number of contracts, assets | Contract 33,276 57,254
Fair value, liabilities $ 2,313,733 $ 1,670,215
Number of contracts, liabilities | Contract 32,037 36,481
Derivatives not designated as accounting hedges: | Commodity contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 247 $ 452
Number of contracts, assets | Contract 640 627
Fair value, liabilities $ 578 $ 73
Number of contracts, liabilities | Contract 377 668
Derivatives not designated as accounting hedges: | Commodity contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 6,620 $ 6,381
Number of contracts, assets | Contract 12,125 18,497
Fair value, liabilities $ 2,044 $ 7,293
Number of contracts, liabilities | Contract 5,597 15,417
Derivatives not designated as accounting hedges: | Credit contracts: | Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 8,197 $ 10,960
Number of contracts, assets | Contract 89 58
Fair value, liabilities $ 10,420 $ 17,120
Number of contracts, liabilities | Contract 35 13
Derivatives not designated as accounting hedges: | Credit contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 28,223 $ 121,557
Number of contracts, assets | Contract 16 17
Fair value, liabilities $ 7,193 $ 98,456
Number of contracts, liabilities | Contract 25 15