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Short-Term Borrowings
12 Months Ended
Dec. 31, 2020
Short-term Debt [Abstract]  
Short-Term Borrowings Short-Term Borrowings
Short-term borrowings consisted of the following:
 December 31,
  
2020Rate2019Rate2018Rate
 (dollars are in millions)
Securities sold under repurchase agreements(1)
$1,765 .22 %$1,072 1.75 %$1,466 4.16 %
Average during year$4,768 .70 $4,130 3.28 $4,189 2.86 
Maximum month-end balance12,497 8,569 5,829 
Commercial paper2,998 .52 2,476 2.21 2,532 2.70 
Other189 111 182 
Total short-term borrowings$4,952 $3,659 $4,180 
(1)The following table presents the quarter end and average quarterly balances of securities sold under repurchase agreements:
 202020192018
FourthThirdSecondFirstFourthThirdSecondFirstFourthThirdSecondFirst
 (in millions)
Quarter end balance
$1,765 $2,185 $2,218 $12,497 $1,072 $5,568 $3,553 $3,714 $1,466 $2,471 $2,743 $2,792 
Average quarterly balance
2,140 2,534 7,210 7,240 1,483 8,432 3,433 3,142 3,045 3,550 5,008 5,182 
During 2019, we recorded a loss of $14 million on extinguishment of certain repurchase agreements.