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ACCOUNTING POLICIES - Consolidation (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Oct. 19, 2016
Rustenburg Mine Employees Trust | Newshelf 1335 Proprietary Limited      
Accounting policies      
Percentage of stake held 30.40%    
Rustenburg Mine Community Development Trust | Newshelf 1335 Proprietary Limited      
Accounting policies      
Percentage of stake held 24.80%    
Sibanye Rustenburg Platinum Mines Proprietary Limited Subsidiary | Newshelf 1335 Proprietary Limited      
Accounting policies      
Percentage of voting equity interests acquired     26.00%
Sibanye Rustenburg Platinum Mines Proprietary Limited Subsidiary | Bakgatla Ba Kgafela Investment Holdings      
Accounting policies      
Percentage of stake held 24.80%    
Sibanye Rustenburg Platinum Mines Proprietary Limited Subsidiary | Siyanda Resources Proprietary Limited      
Accounting policies      
Percentage of stake held 20.00%    
Akanani [Member]      
Accounting policies      
Proportion of ownership interest in subsidiary 6.87%    
Akanani [Member] | LSA UK Limited [Member]      
Accounting policies      
Percentage of stake held 6.13%    
Akanani [Member] | Phembani Group [Member]      
Accounting policies      
Percentage of stake held 13.01%    
LSA UK Limited [Member]      
Accounting policies      
Proportion of ownership interest in subsidiary 4.75%    
LSA UK Limited [Member] | Lonplats Siyakhula Employee Profit Share Trust [Member]      
Accounting policies      
Percentage of stake held 3.80%    
LSA UK Limited [Member] | Phembani Group [Member]      
Accounting policies      
Percentage of stake held 9.01%    
LSA UK Limited [Member] | Marikana Community Trust [Member]      
Accounting policies      
Percentage of stake held 0.90%    
LSA UK Limited [Member] | Bapo Ba Mogale Community Trust [Member]      
Accounting policies      
Percentage of stake held 0.90%    
LSA UK Limited [Member] | Incwala Platinum Pty Ltd Subsidiaries [Member]      
Accounting policies      
Percentage of stake held 4.24%    
DRDGOLD Limited      
Accounting policies      
Percentage of stake held 61.95% 61.95%  
Potential ownership, as a percent 50.10%    
Shares option, price discount, as a percent 10.00%