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ASSET RETIREMENT OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2017
ASSET RETIREMENT OBLIGATIONS  
Schedule of changes to asset retirement obligation liabilities

 

 

 

 

 

 

 

 

 

December 31, 

 

 

2017

 

2016

Asset retirement obligations at beginning of year

 

$

39

 

$

44

Accretion expense

 

 

 2

 

 

 2

Liabilities incurred

 

 

 5

 

 

 —

Liabilities settled

 

 

(5)

 

 

(4)

Foreign currency effect on reserve balance

 

 

 4

 

 

(3)

Asset retirement obligations at end of year

 

$

45

 

$

39