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Share-based Payments - Summary of Share-based Payment Arrangements Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Total included in profit or loss for the year $ 20.5 $ 37.5 $ 26.8
Discontinued operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Total included in profit or loss for the year     0.6
Continuing operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Total included in profit or loss for the year 20.5 37.5 26.8
Gold Fields Limited 2005 Share Plan [Member] | Discontinued operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Total included in profit or loss for the year     0.0
Gold Fields Limited 2005 Share Plan [Member] | Continuing operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Total included in profit or loss for the year 0.0 0.0 0.0
Gold Fields Limited 2012 Share Plan [member] | Discontinued operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Performance Shares     0.0
Bonus Shares     0.0
Gold Fields Limited 2012 Share Plan [member] | Continuing operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Performance Shares 0.0 0.0 0.0
Bonus Shares 0.0 0.0 0.0
Gold Fields Limited 2012 Share Plan Amended [member] | Discontinued operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Performance Shares     0.6
Retention Shares     0.0
Restricted/Matching Shares     0.0
Gold Fields Limited 2012 Share Plan Amended [member] | Continuing operations [member]      
Disclosure of Share-based payment expense recognised in profit or loss [Line items]      
Performance Shares 18.8 34.7 24.5
Retention Shares 1.4 2.5 2.1
Restricted/Matching Shares $ 0.3 $ 0.3 $ 0.2