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EMPLOYEE STOCK BENEFIT PLANS
 9 Months Ended
Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Employee Stock Benefit Plans [Text Block]
EMPLOYEE STOCK BENEFIT PLANS

Stock-based compensation expense was as follows:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
Dollars in Millions
2016
 
2015
 
2016
 
2015
Restricted stock units
$
23

 
$
20

 
$
66

 
$
62

Market share units
9

 
9

 
27

 
27

Performance share units
16

 
34

 
56

 
87

Total stock-based compensation expense
$
48

 
$
63

 
$
149

 
$
176

 
 
 
 
 
 
 
 
Income tax benefit
$
16

 
$
20

 
$
50

 
$
58



The number of units granted and the weighted-average fair value on the grant date were as follows:
 
Nine Months Ended September 30, 2016
Units in Millions
Units
 
Weighted-Average Fair Value
Restricted stock units
2.2

 
$
61.26

Market share units
0.7

 
65.26

Performance share units
1.1

 
64.87



Unrecognized compensation cost related to nonvested awards of $380 million is expected to be recognized over a weighted-average period of 2.5 years.