XML 113 R141.htm IDEA: XBRL DOCUMENT
v3.19.3

Inventories (Narrative) (Details) - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Inventories [Abstract] |  |
Increase (decrease) in provisions for slow-moving and redundant stock | R (1) | R 32
Provision for slow moving and redundant stock | R 281 | R 282

X
- Definition Inventories [Abstract] + References No definition available. + Details
Name: | hmy_InventoriesAbstract
Namespace Prefix: | hmy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inventory Provision + References No definition available. + Details
Name: | hmy_InventoryProvision
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount recognised resulting from the write-down of inventories to net realisable value or reversals of those write-downs. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_WritedownsReversalsOfInventories
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration