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Property, plant and equipment (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Property, plant and equipment      
Amount at beginning of the year R 198,021 R 227,645  
Additions 22,613 16,022 R 38,092
Additions, to sustain existing operations 20,915 14,801  
Additions, to expand operations 1,698 1,221  
Net reclassification (to)/from other assets   46  
Reduction in rehabilitation provisions capitalised (484) (2,425)  
Establishment of joint operation   29,563  
Disposal of business   (6,607)  
Finance costs capitalised 740 880  
Projects/assets capitalised or reclassified (248) (470)  
Reclassification from/(to) held for sale   (1,689)  
Reclassification to held for sale (472)    
Translation of foreign operations 15,037 (21,034)  
Disposals and scrapping (3,802) (457)  
Current year depreciation charge (11,532) (14,920)  
Net impairment of property, plant and equipment 1,435 (28,533)  
Amount at end of the year 221,308 R 198,021 227,645
Gemini HDPE LLC      
Property, plant and equipment      
Proportion of equity interest disposed of   50.00%  
Cost      
Property, plant and equipment      
Amount at beginning of the year 432,779 R 465,723  
Amount at end of the year 462,253 432,779 465,723
Accumulated depreciation and impairment      
Property, plant and equipment      
Amount at beginning of the year (234,758) (238,078)  
Amount at end of the year (240,945) (234,758) (238,078)
Land      
Property, plant and equipment      
Amount at beginning of the year 3,871 5,591  
Additions 20 18  
Additions, to sustain existing operations 20 18  
Net reclassification (to)/from other assets   (2)  
Establishment of joint operation   325  
Disposal of business   (1,399)  
Projects/assets capitalised or reclassified (170) 73  
Reclassification from/(to) held for sale   98  
Reclassification to held for sale (51)    
Translation of foreign operations 407 (775)  
Disposals and scrapping (10) (2)  
Net impairment of property, plant and equipment (57) (56)  
Amount at end of the year 4,010 3,871 5,591
Land | Cost      
Property, plant and equipment      
Amount at beginning of the year 4,145 5,844  
Amount at end of the year 4,357 4,145 5,844
Land | Accumulated depreciation and impairment      
Property, plant and equipment      
Amount at beginning of the year (274) (253)  
Amount at end of the year (347) (274) (253)
Buildings and improvements      
Property, plant and equipment      
Amount at beginning of the year 11,554 11,954  
Additions 80 4  
Additions, to sustain existing operations 75    
Additions, to expand operations 5 4  
Net reclassification (to)/from other assets   56  
Reduction in rehabilitation provisions capitalised   (4)  
Establishment of joint operation   1,097  
Disposal of business   (632)  
Projects/assets capitalised or reclassified (445) 837  
Reclassification from/(to) held for sale   349  
Reclassification to held for sale (22)    
Translation of foreign operations 908 (1,457)  
Disposals and scrapping (533) (19)  
Current year depreciation charge (434) (537)  
Net impairment of property, plant and equipment 13 (94)  
Amount at end of the year 11,121 11,554 11,954
Buildings and improvements | Cost      
Property, plant and equipment      
Amount at beginning of the year 20,462 21,418  
Amount at end of the year 21,466 20,462 21,418
Buildings and improvements | Accumulated depreciation and impairment      
Property, plant and equipment      
Amount at beginning of the year (8,908) (9,464)  
Amount at end of the year (10,345) (8,908) (9,464)
Plant, equipment and vehicles      
Property, plant and equipment      
Amount at beginning of the year 128,986 152,255  
Additions 701 1,063  
Additions, to sustain existing operations 671 948  
Additions, to expand operations 30 115  
Net reclassification (to)/from other assets   (750)  
Reduction in rehabilitation provisions capitalised (33) (55)  
Establishment of joint operation   28,079  
Disposal of business   (4,544)  
Projects/assets capitalised or reclassified 17,482 11,918  
Reclassification from/(to) held for sale   (711)  
Reclassification to held for sale (340)    
Translation of foreign operations 13,527 (18,327)  
Disposals and scrapping (2,565) (184)  
Current year depreciation charge (8,599) (11,080)  
Net impairment of property, plant and equipment 1,416 (28,678)  
Amount at end of the year 150,575 128,986 152,255
Plant, equipment and vehicles | Cost      
Property, plant and equipment      
Amount at beginning of the year 334,432 325,837  
Amount at end of the year 356,420 334,432 325,837
Plant, equipment and vehicles | Accumulated depreciation and impairment      
Property, plant and equipment      
Amount at beginning of the year (205,446) (173,582)  
Amount at end of the year (205,845) (205,446) (173,582)
Mineral assets      
Property, plant and equipment      
Amount at beginning of the year 27,476 30,043  
Additions 58 43  
Additions, to sustain existing operations 58 43  
Net reclassification (to)/from other assets   20  
Reduction in rehabilitation provisions capitalised (56) (1,401)  
Disposal of business   (1)  
Projects/assets capitalised or reclassified 88 2,654  
Reclassification from/(to) held for sale   (981)  
Translation of foreign operations   98  
Disposals and scrapping (87) (49)  
Current year depreciation charge (2,499) (3,303)  
Net impairment of property, plant and equipment   353  
Amount at end of the year 24,980 27,476 30,043
Mineral assets | Cost      
Property, plant and equipment      
Amount at beginning of the year 47,606 84,822  
Amount at end of the year 49,388 47,606 84,822
Mineral assets | Accumulated depreciation and impairment      
Property, plant and equipment      
Amount at beginning of the year (20,130) (54,779)  
Amount at end of the year (24,408) (20,130) (54,779)
Assets under construction      
Property, plant and equipment      
Amount at beginning of the year 26,134 27,802  
Additions 21,754 14,894  
Additions, to sustain existing operations 20,091 13,792  
Additions, to expand operations 1,663 1,102  
Net reclassification (to)/from other assets   722  
Reduction in rehabilitation provisions capitalised (395) (965)  
Establishment of joint operation   62  
Disposal of business   (31)  
Finance costs capitalised 740 880  
Projects/assets capitalised or reclassified (17,203) (15,952)  
Reclassification from/(to) held for sale   (444)  
Reclassification to held for sale (59)    
Translation of foreign operations 195 (573)  
Disposals and scrapping (607) (203)  
Net impairment of property, plant and equipment 63 (58)  
Amount at end of the year 30,622 26,134 27,802
Assets under construction | Cost      
Property, plant and equipment      
Amount at beginning of the year 26,134 27,802  
Amount at end of the year R 30,622 R 26,134 R 27,802