XML 86 R65.htm IDEA: XBRL DOCUMENT v3.8.0.1
GENERAL INFORMATION - Nature of operations (Details)
$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 05, 2017
/ $
General information          
Increase in total revenue due to devaluation of local currencies (as a percent)   3.00%      
Net foreign exchange loss / (gain)   $ 71 $ (157) $ 314  
Foreign currency translation   (638) $ 85 $ (1,836)  
Uzbekistan          
General information          
Exchange rate | / $         8,100
Exchange rate depreciations         92.00%
Net foreign exchange loss / (gain) $ 49 16      
Repatriated amount from subsidiary $ 200        
Foreign currency translation   $ 420      
Italy          
General information          
Ownership interest in joint venture (in percentage)   50.00%