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Short-term Borrowings Short-term Borrowings (Tables)
12 Months Ended
Dec. 31, 2024
Short-Term Debt [Abstract]  
Summary of Short-term Borrowings
The following table provides a summary of short-term borrowings.
(dollar amounts in millions)Federal Funds PurchasedOther
Short-term
Borrowings
December 31, 2024
Amount outstanding at year-end$ $ 
Weighted average interest rate at year-end % %
Maximum month-end balance during the year$37 $3,550 
Average balance outstanding during the year8 829 
Weighted average interest rate during the year5.28 %5.74 %
December 31, 2023
Amount outstanding at year-end$15 $3,550 
Weighted average interest rate at year-end5.30 %5.74 %
Maximum month-end balance during the year$19 $11,000 
Average balance outstanding during the year29 7,189 
Weighted average interest rate during the year4.77 %5.41 %
December 31, 2022
Amount outstanding at year-end$11 $3,200 
Weighted average interest rate at year-end4.32 %4.54 %
Maximum month-end balance during the year$1,106 $3,200 
Average balance outstanding during the year82 354 
Weighted average interest rate during the year3.28 %4.08 %