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Lease - Right of use assets (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year R 12,903 R 13,816
Additions to right-of-use assets 1,577 1,899
Modifications and reassessments (22) (793)
Acquisition of business   111
Disposal of business   (55)
Reclassification from (to) held for sale (109) (44)
Translation of foreign operations 532 497
Terminations (41) (178)
Current year depreciation charge (2,220) (2,317)
Reversal of impairment of right of use assets (note 9) 9  
Net impairment of right of use assets (note 9)   (33)
Carrying amount at end of year 12,629 12,903
Land    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 241 184
Additions to right-of-use assets 1 94
Reclassification from (to) held for sale (28)  
Translation of foreign operations 11 (26)
Current year depreciation charge (11) (11)
Reversal of impairment of right of use assets (note 9) 3  
Carrying amount at end of year 217 241
Buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 5,153 6,446
Additions to right-of-use assets 674 527
Modifications and reassessments (5) (689)
Reclassification from (to) held for sale (42) (3)
Translation of foreign operations 70 (304)
Terminations (17) (125)
Current year depreciation charge (655) (694)
Reversal of impairment of right of use assets (note 9) 2  
Net impairment of right of use assets (note 9)   (5)
Carrying amount at end of year 5,180 5,153
Plant, equipment and vehicles    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 7,508 7,179
Additions to right-of-use assets 900 1,278
Modifications and reassessments (17) (104)
Acquisition of business   111
Disposal of business   (55)
Reclassification from (to) held for sale (39) (41)
Translation of foreign operations 451 827
Terminations (24) (52)
Current year depreciation charge (1,552) (1,607)
Reversal of impairment of right of use assets (note 9) 4  
Net impairment of right of use assets (note 9)   (28)
Carrying amount at end of year 7,231 7,508
Mineral assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 1 7
Additions to right-of-use assets 2  
Terminations   (1)
Current year depreciation charge (2) (5)
Carrying amount at end of year 1 1
Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 18,705 19,532
Carrying amount at end of year 19,766 18,705
Cost | Land    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 549 523
Carrying amount at end of year 301 549
Cost | Buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 7,389 8,046
Carrying amount at end of year 7,616 7,389
Cost | Plant, equipment and vehicles    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 10,763 10,954
Carrying amount at end of year 11,842 10,763
Cost | Mineral assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 4 9
Carrying amount at end of year 7 4
Accumulated depreciation and impairment    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (5,802) (5,716)
Carrying amount at end of year (7,137) (5,802)
Accumulated depreciation and impairment | Land    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (308) (339)
Carrying amount at end of year (84) (308)
Accumulated depreciation and impairment | Buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (2,236) (1,600)
Carrying amount at end of year (2,436) (2,236)
Accumulated depreciation and impairment | Plant, equipment and vehicles    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (3,255) (3,775)
Carrying amount at end of year (4,611) (3,255)
Accumulated depreciation and impairment | Mineral assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (3) (2)
Carrying amount at end of year R (6) R (3)