XML 21 R85.htm IDEA: XBRL DOCUMENT v3.20.1
DERIVATIVE INSTRUMENTS - Gold price option contracts (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
oz
Gold contracts, January 2020 - June 2020  
Disclosure of derivative instruments  
Gold Call Contracts Sold Quantity Outstanding 72,000
Gold Call Contracts Sold Remaining Contractual term 6 months
Gold Call Contracts Sold Exercise Price 1,355
Gold Call Contracts Sold Fair Value Assets Liability | $ $ (12.6)
Gold contracts, July 2020 - December 2020  
Disclosure of derivative instruments  
Gold Call Contracts Sold Quantity Outstanding 96,000
Gold Call Contracts Sold Remaining Contractual term 6 months
Gold Call Contracts Sold Exercise Price 1,415
Gold Call Contracts Sold Fair Value Assets Liability | $ $ (14.1)
Gold  
Disclosure of derivative instruments  
Gold Call Contracts Purchased Quantity Outstanding 168,000
Gold Call Contracts Purchased Remaining Contractual term 12 months
Gold Call Contracts Purchased Exercise Price 1,300
Gold Call Contracts Purchased Fair Value Assets Liability | $ $ 0.3