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Long-term provisions - Expected timing of future cash flows and Business segmentation (Details) - ZAR (R)
R in Millions
Jun. 30, 2025
Jun. 30, 2024
Provisions    
Total provisions R 14,637 R 17,218
Short-term portion (1,688) (2,822)
Long-term provisions 12,949 14,396
Estimated undiscounted obligation 85,097 109,845
Within one year    
Provisions    
Total provisions 1,688 2,822
One to five years    
Provisions    
Total provisions 1,427 2,915
Five to ten years    
Provisions    
Total provisions 2,967 2,208
More than ten years    
Provisions    
Total provisions R 8,555 R 9,273