Intangible Assets, Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 25,180
Foreign currency translation	(8)
Goodwill, ending balance	25,172
Corporate [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	105
Foreign currency translation	0
Goodwill, ending balance	105
Consumer Banking and Lending [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	16,418
Foreign currency translation	0
Goodwill, ending balance	16,418
Commercial Banking [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	2,938
Foreign currency translation	(8)
Goodwill, ending balance	2,930
Corporate and Investment Banking [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	5,375
Foreign currency translation	0
Goodwill, ending balance	5,375
Wealth and Investment Management [Member] | Operating Segments [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	344
Foreign currency translation	0
Goodwill, ending balance	$ 344