v3.26.1
Derivative Financial Instruments - Fair Value and Related Number of Derivative Contracts Categorized by Type of Derivative Contract (Details)
$ in Thousands
May 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 $ 1,434,936 $ 1,824,082
Net amounts per consolidated statements of financial condition, liabilities 1,614,429 1,490,017
Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets 1,708,362 2,777,285
Fair value, liabilities 1,434,576 2,156,827
Amounts offset in the consolidated statements of financial condition, assets (705,242) (1,600,969)
Amounts offset in the consolidated statements of financial condition, liabilities (705,242) (1,600,969)
Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets 249,419 816,969
Fair value, liabilities 253,076 824,438
Amounts offset in the consolidated statements of financial condition, assets (247,920) (815,810)
Amounts offset in the consolidated statements of financial condition, liabilities (252,771) (819,548)
Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets 2,952,925 1,935,592
Fair value, liabilities 3,528,447 2,493,939
Amounts offset in the consolidated statements of financial condition, assets (2,522,608) (1,288,985)
Amounts offset in the consolidated statements of financial condition, liabilities (2,643,657) (1,564,670)
Derivatives designated as accounting hedges:    
Derivatives, Fair Value [Line Items]    
Fair value, assets 13,623 40,444
Fair value, liabilities 18,680 3,093
Derivatives designated as accounting hedges: | Interest rate contracts: | Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 632 $ 0
Number of contracts, assets | Contract 3 0
Fair value, liabilities $ 1,376 $ 2,519
Number of contracts, liabilities | Contract 1 4
Derivatives designated as accounting hedges: | Interest rate contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 0  
Number of contracts, assets | Contract 0  
Fair value, liabilities $ 254  
Number of contracts, liabilities | Contract 1  
Derivatives designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 12,991 $ 40,444
Number of contracts, assets | Contract 7 7
Fair value, liabilities $ 17,050 $ 574
Number of contracts, liabilities | Contract 8 2
Derivatives not designated as accounting hedges:    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 4,897,083 $ 5,489,402
Fair value, liabilities 5,197,419 5,472,111
Derivatives not designated as accounting hedges: | Interest rate contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 1,139 $ 232
Number of contracts, assets | Contract 31,873 33,107
Fair value, liabilities $ 316 $ 24
Number of contracts, liabilities | Contract 30,588 36,811
Derivatives not designated as accounting hedges: | Interest rate contracts: | Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 246,988 $ 806,009
Number of contracts, assets | Contract 8,849 8,148
Fair value, liabilities $ 244,768 $ 804,799
Number of contracts, liabilities | Contract 9,260 8,325
Derivatives not designated as accounting hedges: | Interest rate contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 237,645 $ 285,053
Number of contracts, assets | Contract 1,048 1,576
Fair value, liabilities $ 687,026 $ 614,104
Number of contracts, liabilities | Contract 1,295 823
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 46  
Fair value, liabilities $ 0  
Number of contracts, liabilities | Contract 69  
Derivatives not designated as accounting hedges: | Foreign exchange contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 124,715 $ 115,068
Number of contracts, assets | Contract 34,491 34,418
Fair value, liabilities $ 112,458 $ 103,297
Number of contracts, liabilities | Contract 10,012 12,028
Derivatives not designated as accounting hedges: | Equity contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 1,706,606 $ 2,776,601
Number of contracts, assets | Contract 2,346,548 3,275,468
Fair value, liabilities $ 1,433,972 $ 2,156,730
Number of contracts, liabilities | Contract 1,826,167 2,298,561
Derivatives not designated as accounting hedges: | Equity contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 2,539,543 $ 1,367,089
Number of contracts, assets | Contract 39,955 57,254
Fair value, liabilities $ 2,703,100 $ 1,670,215
Number of contracts, liabilities | Contract 36,753 36,481
Derivatives not designated as accounting hedges: | Commodity contracts: | Exchange-traded    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 617 $ 452
Number of contracts, assets | Contract 637 627
Fair value, liabilities $ 288 $ 73
Number of contracts, liabilities | Contract 563 668
Derivatives not designated as accounting hedges: | Commodity contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 6,563 $ 6,381
Number of contracts, assets | Contract 11,809 18,497
Fair value, liabilities $ 2,631 $ 7,293
Number of contracts, liabilities | Contract 5,458 15,417
Derivatives not designated as accounting hedges: | Credit contracts: | Cleared OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 1,799 $ 10,960
Number of contracts, assets | Contract 107 58
Fair value, liabilities $ 6,932 $ 17,120
Number of contracts, liabilities | Contract 7 13
Derivatives not designated as accounting hedges: | Credit contracts: | Bilateral OTC    
Derivatives, Fair Value [Line Items]    
Fair value, assets $ 31,468 $ 121,557
Number of contracts, assets | Contract 19 17
Fair value, liabilities $ 5,928 $ 98,456
Number of contracts, liabilities | Contract 24 15