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Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]  
Transactions with Significant Shareholders, their Affiliates and Other Related Parties

Transactions with significant shareholders, their affiliates and other related parties were as follows:

 

     December 31,
2017
     December 31,
2016
     December 31,
2015
 

Sales & other services

     —          1        7  

Other purchases

     12        1        65  

Accounts receivable

     7        7        8  

Accounts payable

     51        51        61