Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 7,495	$ 7,621
Acquisitions		3
Foreign currency translation	(8)	(129)
Ending balance	7,487	7,495
Investment Servicing
Goodwill [Roll Forward]
Beginning balance	7,232	7,354
Acquisitions		3
Foreign currency translation	(8)	(125)
Ending balance	7,224	7,232
Investment Management
Goodwill [Roll Forward]
Beginning balance	263	267
Acquisitions		0
Foreign currency translation	0	(4)
Ending balance	$ 263	$ 263