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COST OF SALES
 12 Months Ended
Dec. 31, 2020
Cost of Sales [Abstract]  
COST OF SALES COST OF SALES
US Dollars
Figures in millions202020192018
Cash operating costs1,881 1,831 1,850 
Royalties181 137 133 
Other cash costs12 13 13 
Total cash costs2,074 1,981 1,996 
Retrenchment costs 2 4 4 
Rehabilitation and other non-cash costs32 53 17 
Amortisation of tangible assets (notes 32 and 36)
521 538 553 
Amortisation of right of use assets (notes 16, 32 and 36)
47 42 — 
Amortisation of intangible assets (notes 32 and 36)
2 3 5 
Inventory change21 5 9 
2,699 2,626 2,584