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PROVISIONS (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
PROVISIONS    
Balance at beginning of the year $ 622 $ 1,370
Acquisitions   6
Divestments   (4)
Arising during the year 144 251
Reclassified to assets held for sale (12)  
Utilized (100) (896)
Unused amounts reversed (115) (34)
Discount rate adjustment and imputed interest (change in estimates) 10 1
Translation adjustments and other (11) (72)
Balance at end of the year 538 622
Current 422 148
Non-current 116 474
Income taxes provisions    
PROVISIONS    
Balance at beginning of the year 244 282
Arising during the year 57 67
Reclassified to assets held for sale (1)  
Utilized (4) (21)
Unused amounts reversed (32) (13)
Translation adjustments and other (6) (71)
Balance at end of the year 258 244
Current 258 3
Non-current   241
Indirect tax provisions    
PROVISIONS    
Balance at beginning of the year 96 65
Divestments   (3)
Arising during the year 28 63
Utilized (16) (24)
Unused amounts reversed (4) (5)
Translation adjustments and other (6)  
Balance at end of the year 98 96
Current 98  
Non-current   96
Decommissioning provision    
PROVISIONS    
Balance at beginning of the year 98 87
Acquisitions   5
Arising during the year 5 1
Reclassified to assets held for sale (11)  
Utilized (1)  
Unused amounts reversed (2) (1)
Discount rate adjustment and imputed interest (change in estimates) 10 1
Translation adjustments and other   5
Balance at end of the year 99 98
Current   98
Non-current 99  
Legal provisions    
PROVISIONS    
Balance at beginning of the year 157 919
Acquisitions   1
Arising during the year 28 75
Utilized (66) (821)
Unused amounts reversed (68) (16)
Translation adjustments and other (2) (1)
Balance at end of the year 49 157
Current 33 45
Non-current 16 112
Other provisions    
PROVISIONS    
Balance at beginning of the year 27 17
Divestments   (1)
Arising during the year 26 45
Utilized (13) (30)
Unused amounts reversed (9) 1
Translation adjustments and other 3 (5)
Balance at end of the year 34 27
Current 33 2
Non-current $ 1 $ 25