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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2020
Stock Based Compensation  
Stock-Based Compensation Recognized as Expense

Year Ended December 31, 

    

2020

    

2019

    

2018

Stock compensation expense before tax benefit

$

45

$

77

$

71

Income tax benefit

 

(11)

 

(19)

 

(19)

$

34

$

58

$

52