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SHARE BASED PAYMENTS - Compensation Cost and Activity (Details)
12 Months Ended
Dec. 31, 2019
ZAR (R)
EquityInstruments
shares
Dec. 31, 2018
EquityInstruments
ZAR (R)
shares
Dec. 31, 2017
EquityInstruments
ZAR (R)
Sibanye Stillwater 2017 Share Plan [Member]      
SHARE-BASED PAYMENTS      
Compensation cost not yet recognised R 363,800,000    
Compensation cost recognition period 3 years    
Shares authorized | shares 86,748,850    
Maximum shares allowed per individual participant | shares 8,674,885    
Sibanye 2017 Share Plan - Bonus Shares [Member]      
SHARE-BASED PAYMENTS      
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period 3,269,210    
Number of instruments, granted 3,994,507 5,977,437  
Exercised and released (5,823,174) (2,348,445)  
Forfeited (917,461) (359,782)  
Condition forfeited | shares 2,059,407    
Number of other equity instruments outstanding in share-based payment arrangement at end of period 2,582,489 3,269,210  
Sibanye Stillwater 2017 Share Plan - Performance Shares [Member]      
SHARE-BASED PAYMENTS      
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period 48,535,348 12,953,888  
Number of instruments, granted 30,512,439 41,103,872 2,376,742
Supplementary awards related to the SGL 2013 Plan     10,933,066
Exercised and released   (1,457,586) (105,449)
Forfeited (765,896) (3,995,018) (250,471)
Condition forfeited | shares (10,045,449) (69,808)  
Number of other equity instruments outstanding in share-based payment arrangement at end of period 68,236,442 48,535,348 12,953,888
SGL 2013 Share Plan      
SHARE-BASED PAYMENTS      
Compensation cost not yet recognised R 17,200,000    
Compensation cost recognition period 3 years    
SGL 2013 Share Plan - Performance shares      
SHARE-BASED PAYMENTS      
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period | EquityInstruments 15,215,982 19,379,386 10,610,779
Number of instruments, granted | EquityInstruments     12,851,131
Exercised and released | EquityInstruments (467,017) (2,523,162) (2,616,050)
Forfeited | EquityInstruments (3,602,595) (1,514,145) (1,466,474)
Condition forfeited | shares 11,090 (126,097)  
Number of other equity instruments outstanding in share-based payment arrangement at end of period | EquityInstruments 11,157,460 15,215,982 19,379,386
SGL 2013 Share Plan - Bonus shares      
SHARE-BASED PAYMENTS      
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period | EquityInstruments   446,469 250,827
Number of instruments, granted | EquityInstruments     2,421,522
Exercised and released | EquityInstruments   (415,579) (2,126,415)
Forfeited | EquityInstruments   (30,890) (99,465)
Number of other equity instruments outstanding in share-based payment arrangement at end of period | EquityInstruments     446,469