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Mining and Income Taxation - Summary of Estimated Available for Set-off Against Future Income Pre Tax (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
South African - Components of Mining and Income Tax [Member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure $ 1,743.8 $ 1,641.1
Gross tax losses 217.9 248.7
Gross deferred tax losses not recognised 0.0 0.0
International operations [member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure 0.0 0.0
Gross tax losses 514.4 510.9
Gross deferred tax losses not recognised 337.7 430.0
Abosso Goldfields Limited [member] | International operations [member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure 0.0 0.0
Gross tax losses 176.7 80.9
Gross deferred tax losses not recognised 0.0 0.0
Gold Fields Operations Limited [Member] | South African - Components of Mining and Income Tax [Member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure 681.2 638.0
Gross tax losses 196.2 206.4
Gross deferred tax losses not recognised 0.0 0.0
GFI Joint Venture Holdings (Proprietary) Limited [Member] | South African - Components of Mining and Income Tax [Member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure 1,062.6 1,003.1
Gross tax losses 21.7 41.0
Gross deferred tax losses not recognised 0.0 0.0
Gold Fields Group Services Pty Limited [member] | South African - Components of Mining and Income Tax [Member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure 0.0 0.0
Gross tax losses 0.0 1.3
Gross deferred tax losses not recognised 0.0 0.0
Exploration Entities [member] | International operations [member]    
Disclosure of Estimated Amount Available for Set Off Against Future Income Pretax [Line Items]    
Gross unredeemed capital expenditure 0.0 0.0
Gross tax losses 337.7 430.0
Gross deferred tax losses not recognised $ 337.7 $ 430.0