XML 129 R128.htm IDEA: XBRL DOCUMENT
v3.19.3

Restricted Investments - Reconciliation of Movement in Investments Held by Environmental Trust Funds (Details) - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Increase (decrease) in financial assets |  |  |
Balance at beginning of year | R 3,271 |  |
Fair value gain | 64 | R 71 | R 4
Balance at end of year | 3,301 | 3,271 |
Investments held by environmental trust funds |  |  |
Increase (decrease) in financial assets |  |  |
Balance at beginning of year | 3,238 | 2,621 |
Interest income | 168 | 157 | 153
Fair value gain | 48 | 79 |
Moab Khotsong acquisition | 0 | 382 |
Equity-linked deposits acquired | 300 | 0 |
(Maturity)/acquisition of fixed deposits | (481) | 6 |
Net transfer of cash and cash equivalents | 183 | (7) |
Withdrawal of funds for rehabilitation work performed | (183) | 0 |
Balance at end of year | R 3,273 | 3,238 | R 2,621
Nufcor SA | Investments held by environmental trust funds |  |  |
Increase (decrease) in financial assets |  |  |
Moab Khotsong acquisition |  | R 58 |

X
- Definition Acquisitions Through Business Combinations, Restricted Investments + References No definition available. + Details
Name: | hmy_AcquisitionsThroughBusinessCombinationsRestrictedInvestments
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Decrease Through Withdrawal of Funds for Environmental Rehabilitation + References No definition available. + Details
Name: | hmy_DecreaseThroughWithdrawalofFundsforEnvironmentalRehabilitation
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase (Decrease) Through Acquisition (Disposal) of Cash and Cash Equivalents + References No definition available. + Details
Name: | hmy_IncreaseDecreaseThroughAcquisitionDisposalofCashandCashEquivalents
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (Decrease) Through Equity-Linked Deposits Acquired (Matured( , Financial Assets + References No definition available. + Details
Name: | hmy_IncreaseDecreaseThroughEquityLinkedDepositsAcquiredMaturedFinancialAssets
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (Decrease) Through Fixed Deposits Acquired (Matured), Financial Assets + References No definition available. + Details
Name: | hmy_IncreaseDecreaseThroughFixedDepositsAcquiredMaturedFinancialAssets
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restricted Investments1 + References No definition available. + Details
Name: | hmy_RestrictedInvestments1
Namespace Prefix: | hmy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_20_a_i&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_IncreaseDecreaseInFinancialAssetsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of income arising from interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 23 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23_c&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_28_e&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph B13 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B13_e&doctype=Appendix&seq=2 -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_RevenueFromInterest
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=hmy_RestrictedInvestmentsHeldByEnvironmentalTrustFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=hmy_NufcorSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |