United States Dollar  
  Figures in millions unless otherwise stated 2018      2017   
20. TRADE AND OTHER RECEIVABLES          
  Trade receivables – gold sales and copper concentrate 23.4     46.6  
  Trade receivables – other 23.0     15.6  
  Gold, copper and oil derivative contracts1 8.3     25.0  
  Receivables due from the sale of Tarkwa mining fleet2 26.5      
  Deposits 0.2     0.1  
  Payroll receivables 2.9     11.6  
  Prepayments 43.3     51.5  
  Value added tax and import duties 18.1     45.9  
  Diesel rebate 1.1     1.4  
  Other 6.4     4.2  
  Total trade and other receivables 153.2     201.9  
 
1 Comprises US$1.7 million (2017: US$5.1 million) relating to Australian oil derivative contracts, US$3.0 million (2017: US$9.0 million) relating to Ghanaian oil derivative contracts, US$2.4 million (2017: US$nil) relating to Ghanaian gold derivative contracts, US$nil million (2017: US$10.9 million) relating to gold derivative contracts at South Deep and US$1.2 million (US$nil) relating to Peruvian copper derivative contracts. Refer note 38 for further details.
2 Relates to the sale of mining fleet at Tarkwa as part of the transition to contractor mining.