v3.26.3
REVENUE - Market risk (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Commodity price risk      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Percentage of reasonably possible change, market risk 20.00% 20.00% 20.00%
Commodity price risk | Top of range      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Gains (losses) from change in fair value of derivatives recognised in profit and loss R 2,227.4 R 1,575.6 R 1,247.9
Commodity price risk | Bottom of range      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Gains (losses) from change in fair value of derivatives recognised in profit and loss R (2,227.4) (1,575.6) (1,247.9)
Currency risk      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Percentage of reasonably possible change, market risk 10.00%    
Currency risk | Top of range      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Gains (losses) from change in fair value of derivatives recognised in profit and loss R 1,113.7 787.8 1,247.9
Currency risk | Bottom of range      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Gains (losses) from change in fair value of derivatives recognised in profit and loss R (1,113.7) R (787.8) R (1,247.9)