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SIGNIFICANT TRANSACTIONS - Global Telecom Holding S.A.E share buyback (Details)
$ in Millions, ج.م. in Billions
12 Months Ended
Apr. 16, 2017
shares
Feb. 21, 2017
EGP (ج.م.)
shares
Feb. 21, 2017
USD ($)
shares
Feb. 20, 2017
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
USD ($)
Investments in subsidiaries            
Number of shares bought back         7,603,731  
Loss due to increase in a parent's ownership interest in a subsidiary | $         $ 259 $ (4)
Global Telecom Holding S.A.E            
Investments in subsidiaries            
Number of shares bought back   524,569,062 524,569,062      
Consideration utilised for ordinary shares buy back   ج.م. 4.1 $ 259      
Percentage of increase in ownership interest   5.77% 5.77%      
Percentage of interest in subsidiary   57.69% 57.69% 51.92% 57.70% 51.90%
Loss due to increase in a parent's ownership interest in a subsidiary | $     $ 12      
Number of ordinary shares cancelled 524,569,062