Goodwill and Mortgage Servicing Rights - by Business Segment and Corporate (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Total goodwill	$ 52,144	$ 51,662	$ 50,298	$ 50,315
Corporate
Goodwill [Line Items]
Total goodwill	664	646
Consumer & Community Banking
Goodwill [Line Items]
Total goodwill	32,121	32,121
Corporate & Investment Bank
Goodwill [Line Items]
Total goodwill	8,008	8,008
Commercial Banking
Goodwill [Line Items]
Total goodwill	2,985	2,985
Asset & Wealth Management
Goodwill [Line Items]
Total goodwill	$ 8,366	$ 7,902