Acquisition and Business Combinations - Goodwill (Details) R in Millions, $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Jun. 30, 2026
ZAR (R)
|
Jun. 30, 2025
ZAR (R)
|
Oct. 24, 2025
ZAR (R)
|
Oct. 23, 2025
ZAR (R)
|
Oct. 23, 2025
USD ($)
|
|
| Disclosure of reconciliation of changes in goodwill [line items] | |||||
| Goodwill recognised as of acquisition date | R 2,558 | ||||
| Changes in goodwill [abstract] | |||||
| Goodwill at beginning of period | R 0 | R 0 | |||
| Goodwill recognised as of acquisition date | 2,558 | ||||
| Increase (decrease) through net exchange differences, goodwill | 20 | 0 | |||
| Goodwill at end of period | 2,578 | 0 | |||
| Goodwill | 2,578 | 0 | |||
| CSA | |||||
| Changes in goodwill [abstract] | |||||
| Goodwill at beginning of period | 0 | ||||
| Goodwill at end of period | 2,578 | 0 | |||
| Goodwill | R 2,578 | R 0 | |||
| MAC Copper | |||||
| Disclosure of reconciliation of changes in goodwill [line items] | |||||
| Cash consideration paid | 17,480 | R 17,480 | $ 1,000 | ||
| Identifiable assets acquired (liabilities assumed) | 14,922 | ||||
| Goodwill recognised as of acquisition date | 2,558 | ||||
| Changes in goodwill [abstract] | |||||
| Goodwill recognised as of acquisition date | R 2,558 | ||||
| Description of factors that make up goodwill recognised | The goodwill has been allocated to CSA. The goodwill recognised is mainly attributable to broader strategic benefits to Harmony arising from the acquisition, including increased exposure to copper, portfolio diversification, enhanced operating scale, strategic optionality in relation to future mine planning and development, and the potential to leverage Harmony's technical, operational and financial capabilities across the acquired asset base. None of the goodwill recognised is expected to be deductible for tax purposes. | ||||