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STOCK-BASED AWARD PLANS (Tables)
9 Months Ended
Sep. 30, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of Compensation Expense Related to Stock-Based Awards
Compensation expense related to our stock-based awards was as follows (in millions):
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2019
 
2018
 
2019
 
2018
Share based compensation expense
 
$
5

 
$
4

 
$
20

 
$
18


Unrecognized Stock-based Compensation Expense
Unrecognized stock-based compensation expense and weighted-average years to be recognized are as follows (in millions, except for weighted average years):
 
 
As of September 30, 2019
 
 
Unrecognized stock-
based compensation    
 
    Weighted-average years    
to be recognized
Restricted stock awards
 
$
1

 
0.50
Restricted stock units
 
$
21

 
1.68