Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 7,495	$ 7,621
Acquisitions	44	3
Foreign currency translation	72	(129)
Ending balance	7,611	7,495
Investment Servicing
Goodwill [Roll Forward]
Beginning balance	7,232	7,354
Acquisitions	44	3
Foreign currency translation	70	(125)
Ending balance	7,346	7,232
Investment Management
Goodwill [Roll Forward]
Beginning balance	263	267
Acquisitions	0	0
Foreign currency translation	2	(4)
Ending balance	$ 265	$ 263