XML 144 R133.htm IDEA: XBRL DOCUMENT v3.20.2
Collateral and Contractual Commitments for the Acquisition of Property, Plant and Equipment, Loans to Customers and Other - Additional Information (Detail)
shares in Millions, R in Millions, $ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2020
ZAR (R)
shares
Jun. 30, 2020
ZAR (R)
Facilitation And Notional Vendor Funding [Member]      
Disclosure of collateral and contractual commitments [line items]      
Number Of Shares Settlement 65 65  
Estimated obligation $ 3,000   R 55,000
SABMiller [Member]      
Disclosure of collateral and contractual commitments [line items]      
Sale or issue of treasury shares for settlement of obligation $ 491 R 86  
SABMiller [Member] | Treasury shares [member]      
Disclosure of collateral and contractual commitments [line items]      
Number Of Shares Settlement 108 108  
SABMiller [Member] | Sab Zenzele Holdings [Member]      
Disclosure of collateral and contractual commitments [line items]      
Percentage Of Obligations Due To Be Settled To The The Beneficiaries Of The Share Scheme 77.40%   77.40%
SABMiller [Member] | Sab Zenzele Holdings [Member] | Settlement To Be Made To The Beneficiaries Of The Share Scheme Due To Outbreak Of Pandemic [Member]      
Disclosure of collateral and contractual commitments [line items]      
Percentage Of Obligations Due To Be Settled To The The Beneficiaries Of The Share Scheme 22.60%   22.60%