Deposits (Tables)
3 Months Ended
Mar. 31, 2015
Deposits [Abstract]  
Schedule of Interest Bearing Deposit Accounts
A summary of interest-bearing deposit accounts is as follows (dollars in millions):
 
March 31,
2015
 
December 31,
2014
Certificates of deposit in amounts less than $100,000(1)
$
21,235

 
$
21,502

Certificates of deposit from amounts of $100,000 to less than $250,000(1)
4,397

 
4,481

Certificates of deposit in amounts of $250,000(1) or greater
1,146

 
1,153

Savings deposits, including money market deposit accounts
19,346

 
18,656

Total interest-bearing deposits
$
46,124

 
$
45,792

Average annual interest rate
1.27
%
 
1.29
%
 
 
 
 

(1)
$100,000 represents the basic insurance amount previously covered by the Federal Deposit Insurance Corporation (the "FDIC"). Effective July 21, 2010, the basic insurance per depositor was permanently increased to $250,000.
Schedule of Certificates of Deposit Maturities
Certificates of deposit maturing over the remainder of this year, over each of the next four years, and thereafter were as follows (dollars in millions):
Year
March 31, 2015
2015
$
9,288

2016
$
7,128

2017
$
3,928

2018
$
2,402

2019
$
1,646

Thereafter
$
2,386