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Other Long-Term Liabilities
 12 Months Ended
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]  
Other Long-Term Liabilities
 
20.
OTHER LONG-TERM LIABILITIES
Other long-term liabilities consist of:
 
   
2019
   2018 
Long-term portion of fair value of hedges
[note 23]
  
$
8
 
  $40 
Long-term portion of income taxes payable
  
 
234
 
   205 
Asset retirement obligation
  
 
34
 
   33 
Deferred revenue
 
 
 
74
 
 
 
 
106
 
Long-term lease inducements
[note 18]
  
 
—
 
   16 
Other
  
 
21
 
   — 
   
 
 
   
 
 
 
   
$
371
 
  $400