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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2017
Stock-Based Compensation  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

June 30, 

 

June 30, 

In millions

    

2017

    

2016

    

2017

    

2016

Stock-based compensation:

    

 

 

    

 

 

    

 

 

    

 

 

Stock options

 

$

14

 

$

17

 

$

34

 

$

39

Restricted stock units

 

 

39

 

 

33

 

 

74

 

 

68

Total stock-based compensation

 

$

53

 

$

50

 

$

108

 

$

107