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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation for Continuing Operations

Stock compensation consisted of the following:

  

   2021 2020 
   Years Ended December 31, 
   2021 2020 
   (In millions) 
Stock compensation expense  $   $ 

Summary of Stock Option Activity

The following table summarizes our stock option activity:

 

   Stock Options   Weighted Average Exercise Price   Weighted Average Remaining Contractual Life (Years) 
Outstanding December 31, 2019   1,360   $106.00    9.7 
Outstanding December 31, 2020   1,360   $106.00    8.7 
Outstanding December 31, 2021   1,360   $106.00    7.7 
Exercisable as of December 31, 2021   1,213   $106.00    7.7