Goodwill and Intangible Assets - Goodwill Business Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 14,782	$ 14,653
Acquisitions		130
Other adjustments	(5)	(1)
Goodwill, Ending Balance	14,777	14,782
Credit Card
Goodwill [Roll Forward]
Goodwill, Beginning Balance	5,087	5,088
Acquisitions		0
Other adjustments	(9)	(1)
Goodwill, Ending Balance	5,078	5,087
Consumer Banking
Goodwill [Roll Forward]
Goodwill, Beginning Balance	4,645	4,645
Acquisitions		0
Other adjustments	0	0
Goodwill, Ending Balance	4,645	4,645
Commercial Banking
Goodwill [Roll Forward]
Goodwill, Beginning Balance	5,050	4,920
Acquisitions		130
Other adjustments	4	0
Goodwill, Ending Balance	$ 5,054	$ 5,050