Commercial Paper and Other Short-Term Borrowings (Tables)

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Summary of Commercial Paper and Other Short-Term Borrowings

(Dollars in millions)	June 30, 2013		December 31, 2012
Federal funds purchased and securities sold under repurchase agreements with weighted average interest rates of 0.07% and 0.96% at June 30, 2013 and December 31, 2012, respectively	$	137	$	123
Commercial paper, with weighted average interest rates of 0.17% and 0.20% at June 30, 2013 and December 31, 2012, respectively		3,655		1,240
Total commercial paper and other short-term borrowings	$	3,792	$	1,363