v3.26.3
Share-Based Payments - Narrative (Details)
R in Billions
 3 Months Ended 12 Months Ended
Sep. 18, 2025
R / shares
Sep. 18, 2024
R / shares
Jul. 01, 2024
shares
Apr. 04, 2024
Sep. 18, 2023
R / shares
Sep. 19, 2022
R / shares
Sep. 20, 2021
R / shares
Sep. 18, 2020
R / shares
Sep. 18, 2019
R / shares
Jun. 30, 2024
R / shares
Jun. 30, 2025
R / shares
Jun. 30, 2024
ZAR (R)
Dec. 08, 2023
R / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
30 Day Average Market Price                         100.66
Harmony ESOP Trust                          
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
Ownership interest (as a percent)                       2.00%  
Katleho ya Moruo Employee Share Ownership Plan                          
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
Spot share price (in SA rand per share)                   R 175.65 R 176.36    
Stock Value Issued Period, Exercise of Stock Options | R                       1.3  
Management DSP                          
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
Spot share price (in SA rand per share)               R 74.90          
Participation units | Katleho ya Moruo Employee Share Ownership Plan                          
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
Vesting period (in years)       5 years                  
Number of participation units awarded to each beneficiary under scheme | shares     360                    
Bottom of range | Management DSP                          
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
Spot share price (in SA rand per share) R 299.25 R 162.42     R 84.88 R 42.48 R 45.58   R 46.68        
Top of range | Management DSP                          
Disclosure of terms and conditions of share-based payment arrangement [line items]                          
Spot share price (in SA rand per share) R 360.06 R 203.88     R 105.85 R 47.25 R 57.93   R 55.55