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Taxation - Reconciliation of effective tax rate (Details) - ZAR (R) R in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Reconciliation of average effective tax rate and applicable tax rate
Normal tax rate	27.00%	27.00%	27.00%
Increase/(decrease) in rate of tax due to - disallowed expenditure	13.40%	(2.30%)	6.10%
Increase/(decrease) in rate of tax due to - disallowed share-based payment expenses	0.20%	(0.10%)	0.20%
Increase/(decrease) in rate of tax due to - different tax rates	2.50%	(7.90%)	3.10%
Increase/(decrease) in rate of tax due to - tax losses not recognised	11.80%	(49.60%)	4.80%
Increase/(decrease) in rate of tax due to - translation differences			4.30%
Increase/(decrease) in rate of tax due to - other adjustments	2.10%		2.10%
(Decrease)/increase in rate of tax due to - exempt income	(3.80%)	0.20%	(2.70%)
(Decrease)/increase in rate of tax due to - share of profits of equity accounted investments	(3.60%)	1.40%	(4.90%)
(Decrease)/increase in rate of tax due to - utilisation of tax losses	(1.70%)	0.80%	(0.70%)
(Decrease)/increase in rate of tax due to - investment incentive allowances	(0.30%)	0.20%	(1.30%)
(Decrease)/increase in rate of tax due to - translation differences	(0.10%)	0.40%
(Decrease)/increase in rate of tax due to - capital gains and losses	(0.10%)		(0.20%)
(Decrease)/increase in rate of tax due to - change in corporate income tax rate	(2.80%)
(Decrease)/increase in rate of tax due to - prior year adjustments	(7.50%)		(2.10%)
(Decrease)/increase in rate of tax due to - other adjustments		1.70%
Effective tax rate	37.10%	(28.20%)	35.70%
South Africa
Reconciliation of average effective tax rate and applicable tax rate
Translation difference arising from exchange rates			R 845
United States
Reconciliation of average effective tax rate and applicable tax rate
Normal tax rate	23.00%
Mozambique
Reconciliation of average effective tax rate and applicable tax rate
Normal tax rate	32.00%

X

- Definition

The applicable income tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the expenses not deductible in determining taxable profit. [Refer: Average effective tax rate; Applicable tax rate]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the application of foreign tax rates. [Refer: Average effective tax rate; Applicable tax rate]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from revenue that is exempt from taxation. [Refer: Average effective tax rate; Applicable tax rate]

+ References

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Adjustments for deferred tax of prior periods, translation difference arising from exchange rates

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The decrease in tax rate in the reconciliation between the average effective tax rate and the applicable tax rate resulting from other adjustments.

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- Definition

The increase in tax rate in the reconciliation between the average effective tax rate and the applicable tax rate resulting from other adjustments.

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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the capital gains and losses.

+ References

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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from prior year adjustments.

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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the translation differences.

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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the energy efficiency allowance.

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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the share based payment not deductible in determining taxable profit.

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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the share of profits of equity accounted investments.

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The increase in tax rate in the reconciliation between the average effective tax rate and the applicable tax rate resulting from tax losses not recognised.

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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from decrease in translation differences.

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The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the utilisation of tax losses.

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