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Estimated Capital Allowances (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Operating Loss Carryforwards [Line Items]    
Tax losses, deductible amount $ 187.8 $ 211.1
Calculated tax losses 652.3 739.1
Gold Fields Operations    
Operating Loss Carryforwards [Line Items]    
Tax losses, deductible amount [1] 65.8 84.9
Calculated tax losses [1] $ 219.2 283.0
Tax rate [1] 30.00%  
GFI Joint Venture Holdings    
Operating Loss Carryforwards [Line Items]    
Tax losses, deductible amount [1] $ 6.7 6.3
Calculated tax losses [1] $ 22.2 20.9
Tax rate [1],[2] 30.00%  
Gold Fields Group Services (Proprietary) Limited [Member]    
Operating Loss Carryforwards [Line Items]    
Tax losses, deductible amount [1]   0.2
Calculated tax losses [1]   0.8
Tax rate [1] 28.00%  
Abosso Goldfields Limited    
Operating Loss Carryforwards [Line Items]    
Tax losses, deductible amount [3] $ 23.0 16.3
Calculated tax losses [3] $ 65.7 46.5
Tax rate [3] 35.00%  
Exploration Entities    
Operating Loss Carryforwards [Line Items]    
Tax losses, deductible amount [4] $ 92.3 103.4
Calculated tax losses [4] $ 345.2 $ 387.9
Tax rate 35.00%  
Exploration Entities | Minimum    
Operating Loss Carryforwards [Line Items]    
Tax rate [4] 15.00%  
Exploration Entities | Maximum    
Operating Loss Carryforwards [Line Items]    
Tax rate [4] 35.00%  
[1] These future deductions may be utilized against income generated by the individual tax entity concerned and do not expire unless the tax entity ceases to commercially operate for a period longer than one year. Under South African mining tax ring-fencing legislation, each tax entity is treated separately and as such these deductions can only be utilized by the tax entities in which the deductions have been generated.
[2] During 2014, the South African Revenue Services ("SARS") issued a Finalisation of Audit Letter ("the Audit Letter") stating that SARS had disallowed $1,014.2 million of GFIJVH's recognised capital allowance of $1,586.0 million. The company has not received an assessment from SARS disallowing the $1 014.2 million and the company believes it is more likely than not it has a defendable position over this matter.
[3] Tax losses may be carried forward for five years. These losses expire on a first-in-first-out basis.
[4] The tax losses of $345.2 million (2014: $387.9 million) comprise $3.8 million (2014: $12.1 million) of tax losses that expire between one and two years, $62.9 million (2014: $67.1 million) of tax losses that expire between two and five years, $49.6 million (2014: $62.5 million) of tax losses that expire between five and ten years, $40.7 million (2014: $21.6 million) of tax losses that expire after 10 years and $188.2 million (2014: $224.6 million) of tax losses that have no expiry date.