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(Increase)/decrease in working capital (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
(Increase)/decrease in working capital      
(Increase)/decrease in inventories R (12,281) R (4,872) R 3,397
(Increase)/decrease in trade receivables (9,414) (7,198) 6,431
Increase/(decrease) in trade payables 10,159 4,916 (3,990)
(Increase)/decrease in working capital R (11,536) R (7,154) R 5,838