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Commercial Paper and Other Short-Term Borrowings
 6 Months Ended
Jun. 30, 2015
Short-term Debt [Abstract]  
Commercial Paper and Other Short-Term Borrowings
Commercial Paper and Other Short-Term Borrowings
The following table is a summary of the Company's commercial paper and other short-term borrowings:
(Dollars in millions)
 
June 30, 2015
 
December 31, 2014
Federal funds purchased and securities sold under repurchase agreements, with weighted average interest rates of 0.11% and 0.12% at June 30, 2015 and December 31, 2014, respectively
 
$
587

 
$
111

Commercial paper, with a weighted average interest rate of 0.18% and 0.16% at June 30, 2015 and December 31, 2014, respectively
 
3,675

 
2,593

 Federal Home Loan Bank advances, with a weighted average interest rate of 0.22% at June 30, 2015
 
1,000

 
—

Total commercial paper and other short-term borrowings
 
$
5,262

 
$
2,704