Intangible Assets and Other Assets, Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill Table
Goodwill, beginning balance	$ 25,173
Goodwill, Foreign Currency Translation Gain (Loss)	2
Goodwill, ending balance	25,175
Corporate [Member]
Goodwill Table
Goodwill, beginning balance	105
Goodwill, Foreign Currency Translation Gain (Loss)	0
Goodwill, ending balance	105
Consumer Banking and Lending [Member] | Operating Segments [Member]
Goodwill Table
Goodwill, beginning balance	16,418
Goodwill, Foreign Currency Translation Gain (Loss)	0
Goodwill, ending balance	16,418
Commercial Banking [Member] | Operating Segments [Member]
Goodwill Table
Goodwill, beginning balance	2,931
Goodwill, Foreign Currency Translation Gain (Loss)	2
Goodwill, ending balance	2,933
Corporate and Investment Banking [Member] | Operating Segments [Member]
Goodwill Table
Goodwill, beginning balance	5,375
Goodwill, Foreign Currency Translation Gain (Loss)	0
Goodwill, ending balance	5,375
Wealth and Investment Management [Member] | Operating Segments [Member]
Goodwill Table
Goodwill, beginning balance	344
Goodwill, Foreign Currency Translation Gain (Loss)	0
Goodwill, ending balance	$ 344