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Marketable Securities (Tables)
 12 Months Ended
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]  
Changes in Value of Marketable Securities Reported in Current Assets on Consolidated Balance Sheets

Changes in the value of marketable securities, as reported in current assets on the consolidated balance sheets as at December 31, 2018 and December 31, 2017 are detailed in the tables below:

 

     December 31,
2017		      Purchase      Proceeds at
maturity		     Change
in fair
value
included
in OCI*		     Change in
fair value
recognized
in earnings		      December 31,
2018		  

U.S. Treasury debt securities

      431        —          (100 )      (1 )      —          330  
  

 

 

     

 

 

     

 

 

    

 

 

    

 

 

     

 

 

  

Total

      431        —          (100 )      (1 )      —          330  
  

 

 

     

 

 

     

 

 

    

 

 

    

 

 

     

 

 

  

 

*

Other Comprehensive Income

 

     December 31,
2016		      Purchase      Proceeds
at
maturity		      Change
in fair
value
included
in OCI*		     Change in
fair value
recognized
in earnings		      December 31,
2017		  

U.S. Treasury debt securities

      335        99        —          (3 )      —          431  
  

 

 

     

 

 

     

 

 

     

 

 

    

 

 

     

 

 

  

Total

      335        99        —          (3 )      —          431  
  

 

 

     

 

 

     

 

 

     

 

 

    

 

 

     

 

 

  

 

*

Other Comprehensive Income