Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2011

Short-Term Borrowings (Tables) [Abstract]

Short-Term Borrowings

December 31, dollars in millions	2011			2010			2009
FEDERAL FUNDS PURCHASED
Balance at year end	$	25		$	32		$	160
Average during the year		120			118			143
Maximum month-end balance		844			1,050			214
Weighted-average rate during the year		.13	%		.15	%		.16	%
Weighted-average rate at December 31		.08			.14			.11
SECURITIES SOLD UNDER REPURCHASE AGREEMENTS
Balance at year end	$	1,686		$	2,013		$	1,582
Average during the year		1,861			1,926			1,475
Maximum month-end balance		2,286			2,305			1,582
Weighted-average rate during the year		.28	%		.32	%		.32	%
Weighted-average rate at December 31		.25			.29			.32
OTHER SHORT-TERM BORROWINGS
Balance at year end	$	337		$	1,151		$	340
Average during the year		619			545			1,907
Maximum month-end balance		1,007			1,151			5,078
Weighted-average rate during the year		1.84	%		2.63	%		.84	%
Weighted-average rate at December 31		1.60			2.64			3.22

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 8 (“Derivatives and Hedging Activities”).