v3.25.3
Goodwill and Acquired Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Amount: $ 7,193 $ 7,134
Accumulated Amortization: (1,803) (1,402)
Net Amount: 5,390 5,732
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets 1,230 1,173
Intangible assets, net 6,620 6,905
Exchange and clearing registrations    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets 1,257 1,257
Trade names    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets 121 121
Licenses    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets 52 52
Foreign currency translation adjustment    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (200) (257)
Technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount: 1,234 1,234
Accumulated Amortization: (496) (348)
Net Amount: 738 886
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount: 5,714 5,720
Accumulated Amortization: (1,365) (1,164)
Net Amount: 4,349 4,556
Trade names and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount: 417 417
Accumulated Amortization: (60) (43)
Net Amount: 357 374
Foreign currency translation adjustment    
Finite-Lived Intangible Assets [Line Items]    
Gross Amount: (172) (237)
Accumulated Amortization: 118 153
Net Amount: $ (54) $ (84)