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Lease - Right of use assets (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year R 12,629 R 12,903
Additions to right-of-use assets 1,378 1,577
Modifications and reassessments 350 (22)
Reclassification to assets held for sale (111) (109)
Translation of foreign operations 877 532
Terminations (542) (41)
Current year depreciation charge (2,350) (2,220)
Reversal of impairment of right of use assets   9
Impairment of right of use assets (546)  
Carrying amount at end of year 11,685 12,629
Land    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 217 241
Additions to right-of-use assets 1 1
Modifications and reassessments (2)  
Reclassification to assets held for sale   (28)
Translation of foreign operations 21 11
Current year depreciation charge (11) (11)
Reversal of impairment of right of use assets   3
Impairment of right of use assets (99)  
Carrying amount at end of year 127 217
Buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 5,180 5,153
Additions to right-of-use assets 410 674
Modifications and reassessments 28 (5)
Reclassification to assets held for sale (65) (42)
Translation of foreign operations 185 70
Terminations (14) (17)
Current year depreciation charge (647) (655)
Reversal of impairment of right of use assets   2
Impairment of right of use assets (365)  
Carrying amount at end of year 4,712 5,180
Plant, equipment and vehicles    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 7,231 7,508
Additions to right-of-use assets 967 900
Modifications and reassessments 324 (17)
Reclassification to assets held for sale (46) (39)
Translation of foreign operations 671 451
Terminations (528) (24)
Current year depreciation charge (1,692) (1,552)
Reversal of impairment of right of use assets   4
Impairment of right of use assets (82)  
Carrying amount at end of year 6,845 7,231
Mineral assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 1 1
Additions to right-of-use assets   2
Current year depreciation charge   (2)
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 19,766 18,705
Carrying amount at end of year 21,775 19,766
Cost | Land    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 301 549
Carrying amount at end of year 333 301
Cost | Buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 7,616 7,389
Carrying amount at end of year 8,264 7,616
Cost | Plant, equipment and vehicles    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 11,842 10,763
Carrying amount at end of year 13,174 11,842
Cost | Mineral assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year 7 4
Carrying amount at end of year 4 7
Accumulated depreciation and impairment    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (7,137) (5,802)
Carrying amount at end of year (10,090) (7,137)
Accumulated depreciation and impairment | Land    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (84) (308)
Carrying amount at end of year (206) (84)
Accumulated depreciation and impairment | Buildings    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (2,436) (2,236)
Carrying amount at end of year (3,552) (2,436)
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 (4,611) (3,255)
Carrying amount at end of year (6,329) (4,611)
Accumulated depreciation and impairment | Mineral assets    
Disclosure of quantitative information about right-of-use assets [line items]    
Carrying amount at beginning of year (6) (3)
Carrying amount at end of year R (3) R (6)