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PROVISIONS - Provisions by Type (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of other provisions [line items]    
Provisions $ 3,114 $ 2,904
Environmental rehabilitation (“PER”)    
Disclosure of other provisions [line items]    
Provisions 2,922 2,726
Post-retirement benefits    
Disclosure of other provisions [line items]    
Provisions 43 42
Share-based payments    
Disclosure of other provisions [line items]    
Provisions 26 26
Other employee benefits    
Disclosure of other provisions [line items]    
Provisions 19 22
Other    
Disclosure of other provisions [line items]    
Provisions $ 104 $ 88