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Other Non-Current Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Investments, All Other Investments [Abstract]  
Components of Other Non-Current Assets
 
2017
 
2016
Deferred taxes
$
399

 
$
593

Pension assets
313

 
14

Debt issuance costs
13

 
6

Investments
9

 
4

Other
98

 
58

 
$
832

 
$
675