v3.25.3
Goodwill and Other Intangible Assets - Gross Carrying Amount, Accumulated Amortization and Net Carrying Amount of Other Intangible Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount $ 4,026 $ 3,879  
Accumulated amortization (3,068) (2,790)  
Net carrying amount 958 1,089 $ 1,320
Client relationships      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 2,814 2,706  
Accumulated amortization (2,106) (1,919)  
Net carrying amount 708 787  
Technology      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 405 401  
Accumulated amortization (284) (252)  
Net carrying amount 121 149  
Core deposits      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 703 677  
Accumulated amortization (587) (540)  
Net carrying amount 116 137  
Other      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 104 95  
Accumulated amortization (91) (79)  
Net carrying amount $ 13 $ 16