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Related Parties - Director And Other Key Management Personnel (Details)
R in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
R / shares
Dec. 31, 2019
ZAR (R)
R / shares
Dec. 31, 2018
USD ($)
R / shares
Dec. 31, 2017
USD ($)
R / shares
Disclosure of transactions between related parties [line items]        
Key management personnel compensation | $ $ 2,072,500   $ 2,053,000 $ 1,748,000
Convenience conversation average exchange rate | R / shares 14.445 14.445 13.247 13.301
Executive Directors        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation $ 11,365,000 R 164,175 $ 11,117,000 $ 2,190,000
Total cash equivalent received reconciliation 9,355,000 135,135 2,486,000 1,515,000
KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 6,268,000 90,544 7,570,000 0
Total cash equivalent received reconciliation 6,298,000 90,972 550,000 0
KC Ramon        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 5,097,000 73,631 3,547,000 2,190,000
Total cash equivalent received reconciliation 3,057,000 44,163 1,936,000 1,515,000
Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 25,934,000 374,615 20,855,000 11,916,000
Total cash equivalent received reconciliation 21,113,000 304,970 9,818,000 9,058,000
SD Bailey        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 2,190,000 31,640 0 0
Total cash equivalent received reconciliation 1,041,000 15,038 0 0
CE Carter        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 733,000 10,592 3,719,000 2,322,000
Total cash equivalent received reconciliation 3,431,000 49,558 1,967,000 1,907,000
PD Chenard        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 3,292,000 47,550 0 0
Total cash equivalent received reconciliation 900,000 12,997 0 0
GJ Ehm        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 4,742,000 68,492 3,286,000 2,096,000
Total cash equivalent received reconciliation 2,536,000 36,636 1,751,000 1,758,000
L Eybers        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 4,659,000 67,296 2,511,000 1,680,000
Total cash equivalent received reconciliation 2,082,000 30,072 1,233,000 1,101,000
DC Noko        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 174,000 2,509 2,846,000 1,642,000
Total cash equivalent received reconciliation 2,602,000 37,582 1,436,000 1,381,000
S Ntuli        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 2,565,000 37,055 0 0
Total cash equivalent received reconciliation 1,160,000 16,759 0 0
ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 3,868,000 55,874 2,833,000 1,637,000
Total cash equivalent received reconciliation 2,425,000 35,023 1,399,000 1,350,000
CB Sheppard        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 197,000 2,846 2,961,000 1,413,000
Total cash equivalent received reconciliation 2,687,000 38,815 1,146,000 887,000
TR Sibisi        
Disclosure of transactions between related parties [line items]        
Key management personnel compensation 3,514,000 50,761 2,699,000 1,126,000
Total cash equivalent received reconciliation $ 2,249,000 32,490 $ 886,000 $ 674,000
Deferred share plan, unvested | Executive Directors        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (90,977)    
Deferred share plan, unvested | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (61,842)    
Deferred share plan, unvested | KC Ramon        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (29,135)    
Deferred share plan, unvested | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (148,078)    
Deferred share plan, unvested | SD Bailey        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (18,087)    
Deferred share plan, unvested | CE Carter        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Deferred share plan, unvested | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (18,362)    
Deferred share plan, unvested | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (25,329)    
Deferred share plan, unvested | L Eybers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (25,054)    
Deferred share plan, unvested | DC Noko        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Deferred share plan, unvested | S Ntuli        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (21,041)    
Deferred share plan, unvested | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (20,567)    
Deferred share plan, unvested | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Deferred share plan, unvested | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (19,638)    
Co-investment Plan (CIP), unvested | Executive Directors        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (33,064)    
Co-investment Plan (CIP), unvested | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP), unvested | KC Ramon        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (33,064)    
Co-investment Plan (CIP), unvested | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (124,827)    
Co-investment Plan (CIP), unvested | SD Bailey        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (5,917)    
Co-investment Plan (CIP), unvested | CE Carter        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP), unvested | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP), unvested | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (33,064)    
Co-investment Plan (CIP), unvested | L Eybers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (29,160)    
Co-investment Plan (CIP), unvested | DC Noko        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP), unvested | S Ntuli        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (7,526)    
Co-investment Plan (CIP), unvested | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (26,447)    
Co-investment Plan (CIP), unvested | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP), unvested | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (22,713)    
Share Sign On Incentive, unvested | Executive Directors        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | KC Ramon        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (16,191)    
Share Sign On Incentive, unvested | SD Bailey        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | CE Carter        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (16,191)    
Share Sign On Incentive, unvested | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | L Eybers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | DC Noko        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | S Ntuli        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive, unvested | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   R 0    
Deferred Share Plan (DSP)        
Disclosure of transactions between related parties [line items]        
Vesting period 5 years 5 years    
Deferred Share Plan (DSP) | Executive Directors        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   R (90,977)    
Settlement fair value   15,497    
Deferred Share Plan (DSP) | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (61,842)    
Settlement fair value   7,119    
Deferred Share Plan (DSP) | KC Ramon        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (29,135)    
Settlement fair value   8,378    
Deferred Share Plan (DSP) | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (148,078)    
Settlement fair value   51,870    
Deferred Share Plan (DSP) | SD Bailey        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (18,087)    
Settlement fair value   2,613    
Deferred Share Plan (DSP) | CE Carter        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Settlement fair value   8,778    
Deferred Share Plan (DSP) | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (18,362)    
Settlement fair value   0    
Deferred Share Plan (DSP) | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (25,329)    
Settlement fair value   7,113    
Deferred Share Plan (DSP) | L Eybers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (25,054)    
Settlement fair value   6,701    
Deferred Share Plan (DSP) | DC Noko        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Settlement fair value   5,851    
Deferred Share Plan (DSP) | S Ntuli        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (21,041)    
Settlement fair value   3,269    
Deferred Share Plan (DSP) | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (20,567)    
Settlement fair value   5,864    
Deferred Share Plan (DSP) | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Settlement fair value   6,186    
Deferred Share Plan (DSP) | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (19,638)    
Settlement fair value   5,495    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | Executive Directors        
Disclosure of transactions between related parties [line items]        
Grant fair value   21,504    
Market movement since grant date   2,849    
Vesting fair value   24,353    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | KC Ramon        
Disclosure of transactions between related parties [line items]        
Grant fair value   21,504    
Market movement since grant date   2,849    
Vesting fair value   24,353    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Grant fair value   148,283    
Market movement since grant date   19,300    
Vesting fair value   167,581    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | SD Bailey        
Disclosure of transactions between related parties [line items]        
Grant fair value   4,066    
Market movement since grant date   724    
Vesting fair value   4,789    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | CE Carter        
Disclosure of transactions between related parties [line items]        
Grant fair value   26,276    
Market movement since grant date   3,913    
Vesting fair value   30,188    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | PD Chenard        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Grant fair value   19,622    
Market movement since grant date   (198)    
Vesting fair value   19,424    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | L Eybers        
Disclosure of transactions between related parties [line items]        
Grant fair value   7,463    
Market movement since grant date   2,825    
Vesting fair value   10,289    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | DC Noko        
Disclosure of transactions between related parties [line items]        
Grant fair value   24,906    
Market movement since grant date   4,316    
Vesting fair value   29,222    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | S Ntuli        
Disclosure of transactions between related parties [line items]        
Grant fair value   3,956    
Market movement since grant date   1,046    
Vesting fair value   5,002    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Grant fair value   18,839    
Market movement since grant date   1,460    
Vesting fair value   20,299    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Grant fair value   25,446    
Market movement since grant date   4,338    
Vesting fair value   29,783    
Bonus Share Plan, Co-Investment Plan, And Long Term Incentive Plan | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Grant fair value   17,709    
Market movement since grant date   876    
Vesting fair value   18,585    
Share Sign On Incentive, Cash Settled | Executive Directors        
Disclosure of transactions between related parties [line items]        
Settlement fair value   16,606    
Grant fair value   17,616    
Currency movement since grant date   (1,010)    
Share Sign On Incentive, Cash Settled | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Settlement fair value   16,606    
Grant fair value   17,616    
Currency movement since grant date   (1,010)    
Share Sign On Incentive, Cash Settled | KC Ramon        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | SD Bailey        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | CE Carter        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (6,330)    
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   R 0    
Percentage payable upfront 50.00% 50.00%    
Share Sign On Incentive, Cash Settled | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Settlement fair value   R 0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | L Eybers        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | DC Noko        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | S Ntuli        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Cash Settled | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Settlement fair value   0    
Grant fair value   0    
Currency movement since grant date   0    
Share Sign On Incentive, Share Settled | Executive Directors        
Disclosure of transactions between related parties [line items]        
Grant fair value   20,188    
Market movement since grant date   18,357    
Vesting fair value   38,545    
Share Sign On Incentive, Share Settled | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Grant fair value   20,188    
Market movement since grant date   18,357    
Vesting fair value   38,545    
Share Sign On Incentive, Share Settled | KC Ramon        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | SD Bailey        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | CE Carter        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (13,030)    
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   R 0    
Vesting period 2 years 2 years    
Share Sign On Incentive, Share Settled | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Grant fair value   R 0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | L Eybers        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | DC Noko        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | S Ntuli        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   0    
Share Sign On Incentive, Share Settled | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Grant fair value   0    
Market movement since grant date   0    
Vesting fair value   R 0    
Co-investment Plan (CIP)        
Disclosure of transactions between related parties [line items]        
Performance period 3 years 3 years    
Co-investment Plan (CIP) | Executive Directors        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   R (33,064)    
Co-investment Plan (CIP) | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP) | KC Ramon        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (33,064)    
Co-investment Plan (CIP) | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (124,827)    
Co-investment Plan (CIP) | SD Bailey        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (5,917)    
Co-investment Plan (CIP) | CE Carter        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP) | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP) | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (33,064)    
Co-investment Plan (CIP) | L Eybers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (29,160)    
Co-investment Plan (CIP) | DC Noko        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP) | S Ntuli        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (7,526)    
Co-investment Plan (CIP) | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (26,447)    
Co-investment Plan (CIP) | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Co-investment Plan (CIP) | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (22,713)    
Share Sign On Incentive | Executive Directors        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | KPM Dushnisky        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | KC Ramon        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | Total prescribed officers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (19,356)    
Share Sign On Incentive | SD Bailey        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | CE Carter        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | PD Chenard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   (19,356)    
Share Sign On Incentive | GJ Ehm        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | L Eybers        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | DC Noko        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | S Ntuli        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | ME Sanz Perez        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | CB Sheppard        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   0    
Share Sign On Incentive | TR Sibisi        
Disclosure of transactions between related parties [line items]        
Awards earned during the period reflected but not yet settled   R 0