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Restricted Shares Granted (Detail) (Restricted Stock, Gold Fields Limited 2005 Non-Executive Director Share Plan)
 6 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2010
Restricted Stock | Gold Fields Limited 2005 Non-Executive Director Share Plan
        
Number of Restricted Shares        
Beginning Balance 135,878 41,900 98,878 100,200
Granted during the year       47,300
Exercised and released (37,000) (29,600) (56,978) (11,622)
Ending Balance 98,878 12,300 41,900 135,878