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Unredeemed Capital Expenditure (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Tax Credit Carryforward [Line Items]    
Tax losses available for deduction against future income $ 551.7 $ 661.5
Gold Fields La Cima
   
Tax Credit Carryforward [Line Items]    
Tax losses available for deduction against future income $ 0