Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Beginning balance	$ 7,691	$ 7,611
Acquisitions	243	189
Foreign currency translation	225	(109)
Ending balance	8,159	7,691
Investment Servicing
Goodwill [Roll Forward]
Beginning balance	7,428	7,346
Acquisitions	243	189
Foreign currency translation	220	(107)
Ending balance	7,891	7,428
Investment Management
Goodwill [Roll Forward]
Beginning balance	263	265
Acquisitions	0	0
Foreign currency translation	5	(2)
Ending balance	$ 268	$ 263