v3.24.4
Investments (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Summary of Investment Holdings [Line Items]      
Proceeds from the sale of available for sale securities $ 0 $ 0 $ 5
Taxable interest on investment securities 449 179 182
Tax exempt interest on investment securities 0 0 0
Equity Securities, FV-NI, Gain (Loss) 9 214 (424)
Other Investments in Payment Service Entities with Actively Traded Stocks      
Summary of Investment Holdings [Line Items]      
Equity Securities, FV-NI, Gain (Loss)   214 $ (423)
Other Assets [Member] | Payment Services [Member]      
Summary of Investment Holdings [Line Items]      
Equity securities without readily determinable fair value 35 39  
Equity Securities, FV-NI 1 41  
Other Assets [Member] | Community Reinvestment Act [Member]      
Summary of Investment Holdings [Line Items]      
Equity method investments 514 416  
Investment related to affordable housing projects 456 375  
Other Liabilities [Member] | Community Reinvestment Act [Member]      
Summary of Investment Holdings [Line Items]      
Contingent liabilities related to equity method investments 187 111  
Contingent liabilities related to affordable housing project investments $ 155 $ 100