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Contingent Liabilities - Additional Information (Detail)
R in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2019
USD ($)
Dec. 31, 2019
ZAR (R)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
ZAR (R)
May 30, 2018
USD ($)
May 30, 2018
ZAR (R)
Jan. 01, 2018
USD ($)
Disclosure of contingent liabilities [line items]                
Provisions | $   $ 391.1   $ 319.5 [1]       $ 321.3
GFI Joint Venture Holdings (Proprietary) Limited [Member] | South African Revenue Service [Member]                
Disclosure of contingent liabilities [line items]                
Additional capital allowance recognised           $ 185.1 R 2,708.0  
Tax effect of additional capital allowance recognised           $ 53.7 R 785.3  
Silicosis [Member]                
Disclosure of contingent liabilities [line items]                
Provisions   21.2 R 297.1 $ 25.1 R 367.8      
Nominal amount of provision   $ 29.2 R 408.4          
Alleged thefts [Member] | Randgold and Exploration Summons [Member]                
Disclosure of contingent liabilities [line items]                
Amount of summons claims computed pursuant to allegedly received         43,700.0      
South Deep Mine [member] | Gold Fields Operations Limited [Member]                
Disclosure of contingent liabilities [line items]                
Percentage of ownership interest in joint venture 50.00%              
South Deep Mine [member] | GFI Joint Venture Holdings (Proprietary) Limited [Member]                
Disclosure of contingent liabilities [line items]                
Percentage of ownership interest in joint venture 50.00%              
Based On Value Of Shares [Member] | Alleged thefts [Member] | Randgold and Exploration Summons [Member]                
Disclosure of contingent liabilities [line items]                
Amount of summons claims computed pursuant to allegedly received         R 26,900.0      
[1] Refer note 42.