Related-party transactions - Transactions and balances with related parties (Details) - Rand Refinery - ZAR (R) R in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of transactions between related parties [line items]
Gold sales	R 818	R 710	R 187
Refining fees paid	(40)	(44)	(24)
Trade payable	R (9)	R (6)	R (6)

The amounts payable resulting from related party transactions. [Refer: Total for all related parties [member]]

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The amount of revenue arising from the sale of goods in related party transactions. [Refer: Revenue; Total for all related parties [member]]

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The amount of services received in related party transactions. [Refer: Total for all related parties [member]]

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