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Post-retirement benefit obligations - Reconciliation PBO, RF Contributions (Details) - Pension - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Disclosure of net defined benefit liability (asset)    
Beginning balance R 7,445  
Ending balance 7,009 R 7,445
Reimbursement rights recognised in long-term receivables 122 137
Gain (loss) recognised in other comprehensive income (14) (42)
Benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 76,056 70,508
Movements recognised in the income statement: 10,162 9,310
current service cost 1,585 1,564
interest cost 8,577 7,746
Actuarial losses/(gains) recognised in other comprehensive income: 2,081 (1,835)
arising from changes in financial assumptions 801 (141)
arising from change in actuarial experience 1,280 (1,694)
Member contributions 601 562
Benefits paid (4,460) (4,385)
Translation of foreign operations (557) 1,896
Ending balance 83,883 76,056
Benefit obligation | Unfunded benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 8,229  
Ending balance 7,919 8,229
Benefit obligation | Funded benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 67,827  
Ending balance 75,964 67,827
South Africa    
Disclosure of net defined benefit liability (asset)    
Beginning balance (84)  
Ending balance (92) (84)
South Africa | Benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 64,049 60,478
Movements recognised in the income statement: 9,268 8,426
current service cost 1,145 1,066
interest cost 8,123 7,360
Actuarial losses/(gains) recognised in other comprehensive income: 2,236 (1,482)
arising from changes in financial assumptions 911 421
arising from change in actuarial experience 1,325 (1,903)
Member contributions 601 562
Benefits paid (3,968) (3,935)
Ending balance 72,186 64,049
South Africa | Benefit obligation | Funded benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 64,049  
Ending balance 72,186 64,049
Foreign Countries    
Disclosure of net defined benefit liability (asset)    
Beginning balance 7,529  
Ending balance 7,101 7,529
Foreign Countries | Benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 12,007 10,030
Movements recognised in the income statement: 894 884
current service cost 440 498
interest cost 454 386
Actuarial losses/(gains) recognised in other comprehensive income: (155) (353)
arising from changes in financial assumptions (110) (562)
arising from change in actuarial experience (45) 209
Benefits paid (492) (450)
Translation of foreign operations (557) 1,896
Ending balance 11,697 12,007
Foreign Countries | Benefit obligation | Unfunded benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 8,229  
Ending balance 7,919 8,229
Foreign Countries | Benefit obligation | Funded benefit obligation    
Disclosure of net defined benefit liability (asset)    
Beginning balance 3,778  
Ending balance R 3,778 R 3,778