v3.25.3
Share-Based Payments - Total Costs Related to Employee Share-Based Payments (Details) - ZAR (R)
3 Months Ended 12 Months Ended
Sep. 18, 2024
Sep. 18, 2023
Sep. 19, 2022
Sep. 20, 2021
Sep. 18, 2020
Sep. 18, 2019
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Apr. 04, 2024
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Expense from share-based payment transactions with employees               R 712,000,000 R 244,000,000 R 114,000,000  
Shares issued relating to exercise of share options (in shares)               2,133,311 1,910,916    
Harmony ESOP Trust                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Ownership interest (as a percent)                 2.00%    
Ordinary shares | Harmony ESOP Trust | Share trust controlled by entity                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of shares in entity held by entity or by its subsidiaries or associates (in shares)                     12,651,525
Management DSP                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Expense from share-based payment transactions with employees               R 256,000,000 R 132,000,000 114,000,000  
Spot share price (in SA rand per share)         R 74.90            
Management DSP | Ordinary shares                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of shares authorised               25,000,000      
Number of instruments granted in share-based payment arrangement               6,395,468      
Management DSP | Floor                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Spot share price (in SA rand per share) R 162.42 R 84.88 R 42.48 R 45.58   R 45.89          
Management DSP | Floor | September 18, 2024 [Member]                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Expected volatility, share options granted 51.74%                    
Expected dividend, share options granted 0.11%                    
Spot Price on Grant Date R 168.28                    
Risk free interest rate, share options granted 7.29%                    
Management DSP | Cap                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Spot share price (in SA rand per share) R 203.88 R 105.85 R 47.25 R 57.93   R 56.87          
Management DSP | Cap | September 18, 2024 [Member]                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Expected volatility, share options granted 58.95%                    
Expected dividend, share options granted 0.71%                    
Spot Price on Grant Date R 204.55                    
Risk free interest rate, share options granted 7.65%                    
Management DSP | Over five years [Member] | September 18, 2024 [Member]                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Vesting period (in years) 5 years                    
Management DSP | Over three years [Member] | September 18, 2024 [Member]                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Vesting period (in years) 3 years                    
Katleho ya Moruo Employee Share Ownership Plan                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Expense from share-based payment transactions with employees               R 456,000,000 R 112,000,000 R 0  
Spot share price (in SA rand per share)             R 175.65 R 176.36