Parent Company (Balance Sheet) (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items]
Other assets	[1]	$ 37,903	$ 38,425
Total assets		561,580	557,263
Subordinated debt		4,875	6,307
Total liabilities		510,439	511,451
Shareholders’ equity		51,105	45,774
Total liabilities and equity		561,580	557,263
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash held at banking subsidiary		6,599	4,654
Restricted deposits with banking subsidiary		175	175
Loans with affiliates		1,687	1,484
Other assets		1,297	2,057
Total assets		76,882	60,407
Subordinated debt		1,749	1,728
Senior debt		22,213	11,379
Accrued expenses and other liabilities		1,815	1,526
Total liabilities		25,777	14,633
Shareholders’ equity		51,105	45,774
Total liabilities and equity		76,882	60,407
Bank Subsidiaries And Bank Holding Company | Parent Company
Condensed Financial Statements, Captions [Line Items]
Investments in subsidiaries		64,104	48,867
Non Bank Subsidiaries | Parent Company
Condensed Financial Statements, Captions [Line Items]
Investments in subsidiaries		$ 3,020	$ 3,170

[1] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $0.7 billion, Loans of $1.2 billion and Other assets of $0.1 billion at December 31, 2023. Comparable amounts at December 31, 2022 were $0.9 billion, $1.3 billion and $0.1 billion, respectively.