XML 160 R153.htm IDEA: XBRL DOCUMENT v3.8.0.1
Trade and Other Receivables - Schedule of Trade and Other Receivables (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Trade and other receivables [abstract]    
Trade receivables - gold sales and copper concentrate $ 46.6 $ 58.2
Trade receivables - other 15.6 4.5
Gold and oil derivative contracts 25.0 0.0
Deposits 0.1 0.3
Payroll receivables 11.6 10.7
Prepayments 51.5 50.1
Value added tax and import duties 45.9 39.6
Diesel rebate 1.4 1.3
Other 4.2 5.5
Total trade and other receivables $ 201.9 $ 170.2