XML 93 R139.htm IDEA: XBRL DOCUMENT v3.19.3

Investment in Joint Operations (Details) - Wafi-Golpu joint operation	12 Months Ended
	Jun. 30, 2019
Disclosure of joint operations [line items]
Proportion of ownership interest in joint operation (as a percent)	50.00%
Newcrest Mining Limited
Disclosure of joint operations [line items]
Proportion of ownership interest in joint operation (as a percent)	50.00%

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2018-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_21_a_iv&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_JointOperationsAxis=hmy_WafiGolpuJointOperationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=hmy_NewcrestMiningLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: