Quarterly report pursuant to Section 13 or 15(d)

Securities - Narrative (Details)

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Securities - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Other assets    
Investments, Debt And Equity Securities [Line Items]    
Equity securities, fair value $ 250 $ 251
Equity securities, cost 390 377
Time Deposits Placed and Other Short-term Investments    
Investments, Debt And Equity Securities [Line Items]    
Time deposits placed and other short-term investments 1,500 1,200
AFS securities    
Investments, Debt And Equity Securities [Line Items]    
Accumulated net unrealized loss on AFS debt securities 2,500  
Accumulated other comprehensive income benefit 836  
U.S. Agency And U.S. Treasury Securities    
Investments, Debt And Equity Securities [Line Items]    
AFS and HTM debt securities 866,700 824,900
All Non U.S. Agency And Non U.S. Treasury Securities    
Investments, Debt And Equity Securities [Line Items]    
AFS and HTM debt securities $ 36,600 $ 40,200