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FINANCE COSTS AND UNWINDING OF OBLIGATIONS (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of finance costs and unwinding of obligations [Abstract]  
Disclosure of Finance Costs and Unwinding of Obligations by Item
US Dollars
Figures in millions202020192018
Finance costs
Finance costs on bonds, corporate notes, bank loans and other124 135 128 
Amortisation of fees23 4 7 
Lease finance charges8 10 5 
Less: interest captalised(17)(6)— 
138 143 140 
Unwinding of obligations39 29 28 
Total finance costs and unwinding of obligations (notes 32 and 36)
177 172 168 
The interest included within finance costs is calculated at effective interest rates.