v3.25.4
Goodwill and Acquired Intangible Assets - Changes in Carrying Amount of Goodwill as Allocated to Reportable Segments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Goodwill [Roll Forward]    
Beginning balance $ 11,951 $ 11,951
Goodwill Acquired And Other Changes During Period 0 0
Ending balance 11,951 11,951
Investor Services    
Goodwill [Roll Forward]    
Beginning balance 8,083 7,969
Goodwill Acquired And Other Changes During Period 0 114
Ending balance 8,083 8,083
Advisor Services    
Goodwill [Roll Forward]    
Beginning balance 3,868 3,982
Goodwill Acquired And Other Changes During Period 0 (114)
Ending balance $ 3,868 $ 3,868