Parent Company (Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Other assets	[1]	$ 35,326	$ 30,999
Total assets		557,191	466,679
Subordinated debt		6,996	6,403
Total liabilities		501,465	412,638
Shareholders’ equity		55,695	54,010
Total liabilities and equity		557,191	466,679
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash held at banking subsidiary		5,367	14,882
Restricted deposits with banking subsidiary		175	175
Loans with affiliates		1,179	1,021
Other assets		1,999	1,934
Total assets		68,009	65,988
Subordinated debt		982	1,010
Senior debt		10,362	9,567
Other borrowed funds from affiliates		343	780
Accrued expenses and other liabilities		627	621
Total liabilities		12,314	11,978
Shareholders’ equity		55,695	54,010
Total liabilities and equity		68,009	65,988
Bank Subsidiaries And Bank Holding Company | Parent Company
Condensed Financial Statements, Captions [Line Items]
Investments in subsidiaries		56,596	45,992
Non Bank Subsidiaries | Parent Company
Condensed Financial Statements, Captions [Line Items]
Investments in subsidiaries		$ 2,693	$ 1,984

[1] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $1.9 billion, Loans of $1.5 billion and Other assets of $0.1 billion at December 31, 2021 and Loans held for sale of $1.2 billion, Loans of $1.4 billion and Other assets of $0.1 billion at December 31, 2020.