XML 416 R108.htm IDEA: XBRL DOCUMENT v3.20.1
Share-Based Payments - Summary of Share Based Payment Performance Condition (Detail) - $ / oz
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Vesting Target Threshold Top of Range [Member] | Free Cash Flow Margin [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Threshold performance period, in years 0 years    
Target performance period in years 0 years    
Stretch performance period in years 0 years    
Gold Fields Limited 2012 Share Plan Amended [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Gold price per ounce, Threshold 1,200 1,300 1,300
Gold price per ounce, Target 1,200 1,300 1,300
Gold price per ounce, Stretch and Cap 1,200 1,300 1,300
Gold Fields Limited 2012 Share Plan Amended [member] | Relative TSR [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Weighting 33.00%    
Threshold Median of the peer group    
Target Linear vesting to apply between median and upper quartile performance and capped at upper quartile performance    
Gold Fields Limited 2012 Share Plan Amended [member] | Absolute Total Shareholder Return ("TSR") [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Stretch and cap: Compounded cost of equity in real terms over 3 year performance period 6.00%    
Weighting 33.00%    
Threshold N/A - No vesting below target    
Target Compounded cost of equity in real terms over three-year performance period    
Stretch and cap Compounded cost of equity in real terms over three-year performance period +6% per annum    
Gold Fields Limited 2012 Share Plan Amended [member] | Free Cash Flow Margin [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Free cash flow margin ("FCFM"), Threshold 5.00%    
Free cash flow margin ("FCFM"), Target 15.00%    
Free cash flow margin ("FCFM"), Stretch and Cap 20.00%    
Weighting 34.00%    
Threshold Average FCFM over performance period of 5% at a gold price of S1,200/oz for the 2019 allocation (2017 and 2018 allocations: $1,300/oz) - margin to be adjusted relative to the actual gold price for the three-year period    
Target Average FCFM over performance period of 15% at a gold price of $1,200/oz for the 2019 allocation (2017 and 2018 allocations: $1,300/oz) - margin to be adjusted relative to the actual gold price for the three-year period    
Stretch and cap Average FCFM over performance period of 20% at a gold price of $1,200/oz for the 2019 allocation (2017 and 2018 allocations: $1,300/oz) - margin to be adjusted relative to the actual gold price for the three-year period    
Gold Fields Limited 2012 Share Plan Amended [member] | Vesting Target Threshold Top of Range [Member] | Absolute Total Shareholder Return ("TSR") [member]      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Target performance period in years 3 years    
Stretch performance period in years 3 years