Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Components of Short-Term Borrowings

Selected financial information pertaining to the components of our short-term borrowings is as follows:

December 31,
dollars in millions	2016			2015			2014
FEDERAL FUNDS PURCHASED
Balance at year end	$	1,005		$	20		$	18
Average during the year	44			195			32
Maximum month-end balance	1,005			678			36
Weighted-average rate during the year (a)	.68		%	.14		%	.10		%
Weighted-average rate at December 31(a)	.55			.05			.08
SECURITIES SOLD UNDER REPURCHASE AGREEMENTS
Balance at year end	$	497		$	352		$	557
Average during the year	443			437			1,150
Maximum month-end balance	684			589			1,519
Weighted-average rate during the year (a)	.04		%	.00		%	.16		%
Weighted-average rate at December 31(a)	.07			.00			.01
OTHER SHORT-TERM BORROWINGS
Balance at year end	$	808		$	533		$	423
Average during the year	852			572			597
Maximum month-end balance	872			1,122			996
Weighted-average rate during the year (a)	1.18		%	1.52		%	1.49		%
Weighted-average rate at December 31(a)	1.11			1.78			1.58

(a) Rates exclude the effects of interest rate swaps and caps, which modify the repricing characteristics of certain short-term borrowings. For more information about such financial instruments, see Note 9 (“Derivatives and Hedging Activities”).