Environmental rehabilitation obligation and other provisions - Schedule of environmental rehabilitation obligation activity (Details) - ZAR (R) R in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Provision for decommissioning, restoration and rehabilitation costs [abstract]
Balance at beginning of the year	R 11,805	R 11,355	R 8,435
Interest charge	984	966	758
Utilisation of environmental rehabilitation obligation	(227)	(488)	(274)
Change in estimates charged to profit or loss	477	433	(82)
Change in estimates capitalised	1,220	204	(419)
Environmental rehabilitation obligation on acquisition of subsidiaries	0	0	3,576
Derecognition with deemed disposal of interest in joint operation	0	0	(818)
Liabilities associated with assets held for sale	(29)	(451)	0
Foreign currency translation	(230)	(214)	179
Balance at end of the year	14,000	11,805	11,355
Reconciliation of the non-current and current portion of the environmental rehabilitation obligation:
Current portion of environmental rehabilitation obligation	0	0	0
Non-current portion of environmental rehabilitation obligation	R 14,000	R 11,805	R 11,355

The amount of non-current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 37
-IssueDate 2025-01-01
-Section D Examples: disclosures
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
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-IssueDate 2025-01-01
-Paragraph 87
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2025-en-r&anchor=para_87&doctype=Standard
-URIDate 2025-03-27

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- Definition

The amount of provision for costs related to decommissioning, restoration and rehabilitation. [Refer: Other provisions]

+ References

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The amount of current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs]

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- Definition

Acquisitions through business combinations, environmental rehabilitation obligation

+ References

No definition available.

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Decrease Through Classified As Held For Sale, Environmental Rehabilitation Obligation

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Derecognition On Disposal, Environmental Rehabilitation Obligation

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- Definition

Amount of charge to profit or loss during the period which is attributable to environmental rehabilitation without the effect of the change in the right of recovery receivable/(payable).

+ References

No definition available.

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- Definition

The reduction in the environmental rehabilitation obligation due to payments or capitalisation of operating expenditures.

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No definition available.

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- Definition

The increase (decrease) in environmental rehabilitation obligation resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity.

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No definition available.

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The amount of interest expense related to change in the present value of the provision for the environmental rehabilitation obligation.

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No definition available.

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Provision for decommissioning, restoration and rehabilitation costs and other provisions

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Increase (decrease) to rehabilitation obligation due to changes in estimates, which are defined as changes in reserves and corresponding changes in life of mine, changes in discount rates, and changes in laws and regulations governing environmental matters.

+ References

No definition available.

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