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Unredeemed Capital Expenditure and Tax Loss Carry Forward (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Jun. 30, 2010
Abosso Goldfields Limited
      
Operating Loss Carryforwards [Line Items]      
Unredeemed capital expenditure     $ 15.5
Gold Fields La Cima
      
Operating Loss Carryforwards [Line Items]      
Unredeemed capital expenditure 507.9 163.6 710.1
South African Mining Operations
      
Operating Loss Carryforwards [Line Items]      
Unredeemed capital expenditure 1,657.8 1,824.5 1,538.5
South African Mining Operations | GFI Mining South Africa (Proprietary) Limited | Beatrix
      
Operating Loss Carryforwards [Line Items]      
Unredeemed capital expenditure   117.6 140.2
South African Mining Operations | Gold Fields Operations
      
Operating Loss Carryforwards [Line Items]      
Unredeemed capital expenditure 608.4 587.3 462.1
South African Mining Operations | GFI Joint Venture Holdings
      
Operating Loss Carryforwards [Line Items]      
Unredeemed capital expenditure $ 1,049.4 $ 1,119.6 $ 936.2