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Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2015
Employee Benefit Plans [Abstract]  
Stock-Based Compensation Expense Recognized in Noninterest Expense
(Dollars in millions)
2015
 
2014
Stock options

$—

 

$1

Restricted stock
6

 
8

RSUs
18

 
14

Total stock-based compensation

$24

 

$23

Stock-based compensation tax benefit

$9

 

$9
Schedule of Net Benefit Costs [Table Text Block]
 
Pension Benefits 1
 
Other Postretirement Benefits
(Dollars in millions)
2015
 
2014
 
2015
 
2014
Service cost

$1

 

$1

 

$—

 

$—

Interest cost
29

 
31

 
—

 
1

Expected return on plan assets
(51
)
 
(50
)
 
(1
)
 
(2
)
Amortization of actuarial loss/(gain)
5

 
4

 
—

 
(1
)
Amortization of prior service credit
—

 
—

 
(1
)
 
—

Net periodic benefit

($16
)
 

($14
)
 

($2
)
 

($2
)
1 Administrative fees are recognized in service cost for each of the periods presented.