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Unredeemed Capital Expenditure (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Tax Credit Carryforward [Line Items]    
Unredeemed capital expenditure, Taxable amount $ 657.0 $ 762.2
Unredeemed capital expenditure 2,179.3 2,531.9
Gold Fields Operations    
Tax Credit Carryforward [Line Items]    
Unredeemed capital expenditure, Taxable amount 158.4 197.0
Unredeemed capital expenditure $ 528.2 656.9
Tax rate [1] 30.00%  
GFI Joint Venture Holdings    
Tax Credit Carryforward [Line Items]    
Unredeemed capital expenditure, Taxable amount [2] $ 475.8 546.8
Unredeemed capital expenditure [2] $ 1,586.0 1,822.6
Tax rate [1],[2] 30.00%  
Abosso Goldfields Limited    
Tax Credit Carryforward [Line Items]    
Unredeemed capital expenditure, Taxable amount $ 22.4 18.0
Unredeemed capital expenditure $ 63.9 51.3
Tax rate [3] 35.00%  
Gold Fields Australia (Proprietary) Limited    
Tax Credit Carryforward [Line Items]    
Unredeemed capital expenditure, Taxable amount $ 0.4  
Unredeemed capital expenditure $ 1.2  
Tax rate 30.00%  
Exploration Entities    
Tax Credit Carryforward [Line Items]    
Unredeemed capital expenditure, Taxable amount   0.4
Unredeemed capital expenditure   $ 1.1
Tax rate 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.