XML 115 R108.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-Based Payments - Summary of Share Based Payment Performance Condition (Detail)
 12 Months Ended
Dec. 31, 2017
$ / oz
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
Absolute TSR [Member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
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
Absolute Net Shareholder Return [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%
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]  
Gold price per ounce, Threshold 1,300
Gold price per ounce, Target 1,300
Gold price per ounce, Stretch and Cap 1,300
Free cash flow margin ("FCFM"), Threshold 5.00%
Free cash flow margin ("FCFM"), Target 15.00%
Years performance period 3 years
Free cash flow margin ("FCFM"), Stretch and Cap 20.00%
Vesting Target Threshold Bottom of Range [Member] | Absolute Net Shareholder Return [Member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Threshold - Absolute TSR N/A
Vesting Target Threshold Top of Range [Member] | Absolute Net Shareholder Return [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
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]  
Weighting 34.00%
Threshold Average FCFM over performance period of 5% at a gold price of $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 $1,300/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 $1,300/oz - margin to be adjusted relative to the actual gold price for the three-year period