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PROVISIONS - Provisions by Type (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure of other provisions [line items]    
Provisions $ 3,141 $ 2,363
Environmental rehabilitation (PER)    
Disclosure of other provisions [line items]    
Provisions 2,944 2,179
Post-retirement benefits    
Disclosure of other provisions [line items]    
Provisions 48 72
Share-based payments    
Disclosure of other provisions [line items]    
Provisions 37 34
Other employee benefits    
Disclosure of other provisions [line items]    
Provisions 27 45
Other    
Disclosure of other provisions [line items]    
Provisions $ 85 $ 33