Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2020

Short-term Debt [Abstract]

Summary of Short-Term Borrowings

Selected information for FHLB advances and other short-term borrowings is as follows:

(Dollar amounts in millions)	2020			2019			2018
Federal Home Loan Bank advances
Average amount outstanding	$	206		$	3,149		$	2,971
Average rate	1.11		%	2.50		%	2.01		%
Highest month-end balance	$	2,200		$	4,950		$	5,400
Year-end balance	—			1,000			4,500
Average rate on outstanding advances at year-end	—		%	1.73		%	2.61		%
Other short-term borrowings, year-end balances
Federal funds purchased	$	1,105		$	472		$	541
Security repurchase agreements	406			515			527
Securities sold, not yet purchased	61			66			85
Federal funds purchased and other short-term borrowings	$	1,572		$	2,053		$	5,653