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Share-Based Payments - Summary of Share Based Payment Performance Condition (Detail) - Gold Fields Limited 2012 Share Plan Amended [member]
 12 Months Ended
Dec. 31, 2018
$ / oz
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
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 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
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%
Years performance period 3 years
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 $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
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