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Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2020
Text block [abstract]  
Summary of Cash and Cash Equivalents
As of December 31, 2020 and 2019, consolidated cash and cash equivalents consisted of:
 
       
2020
   
2019
 
Cash and bank accounts
  $     501    547 
Fixed-income securities and other cash equivalents
     449    241 
    
 
 
   
 
 
 
  $     950    788