v3.26.3
Derivative Financial Instruments - Disclosure of Open Position at the Reporting Date (Details)
oz in Thousands, R / kg in Thousands, $ in Millions
Jun. 30, 2026
USD ($)
R / kg
oz
$ / Ounce
$ / oz
R / $
Rand Gold Forward Hedging Contracts | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 66
Rand Gold Forward Hedging Contracts | Cash flow hedges | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 36
Rand Gold Forward Hedging Contracts | Cash flow hedges | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 20
Rand Gold Forward Hedging Contracts | Cash flow hedges | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 10
Rand Gold Forward Hedging Contracts | Cash flow hedges | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 0
Rand Gold Forward Hedging Contracts | Cash flow hedges | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 0
Rand Gold Forward Hedging Contracts | Cash flow hedges | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 0
US$ Gold Forward Hedging Contracts | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 13
US$ Gold Forward Hedging Contracts | Cash flow hedges | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 6
US$ Gold Forward Hedging Contracts | Cash flow hedges | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 6
US$ Gold Forward Hedging Contracts | Cash flow hedges | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 1
US$ Gold Forward Hedging Contracts | Cash flow hedges | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 0
US$ Gold Forward Hedging Contracts | Cash flow hedges | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 0
US$ Gold Forward Hedging Contracts | Cash flow hedges | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 0
Rand Gold Zero Cost Collars | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 618
Rand Gold Zero Cost Collars | Cash flow hedges | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 144
Rand Gold Zero Cost Collars | Cash flow hedges | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 156
Rand Gold Zero Cost Collars | Cash flow hedges | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 110
Rand Gold Zero Cost Collars | Cash flow hedges | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 110
Rand Gold Zero Cost Collars | Cash flow hedges | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 64
Rand Gold Zero Cost Collars | Cash flow hedges | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 34
US Gold Zero Cost Collars | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 84
US Gold Zero Cost Collars | Cash flow hedges | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 24
US Gold Zero Cost Collars | Cash flow hedges | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 19
US Gold Zero Cost Collars | Cash flow hedges | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 17
US Gold Zero Cost Collars | Cash flow hedges | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 15
US Gold Zero Cost Collars | Cash flow hedges | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 6
US Gold Zero Cost Collars | Cash flow hedges | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 3
Zero cost collars  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 50
Zero cost collars | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 18.14
Zero cost collars | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 20.14
Zero cost collars | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 40
Zero cost collars | Due between 0 to six months (c) | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 18.19
Zero cost collars | Due between 0 to six months (c) | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 20.19
Zero cost collars | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 10
Zero cost collars | Due between six to 12 months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 17.95
Zero cost collars | Due between six to 12 months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 19.95
Zero cost collars | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
Zero cost collars | Later Than One Year Not Later Than One Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than One Year Not Later Than One Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
Zero cost collars | Later Than One Year Six Months and Not Later Than Two Years | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than One Year Six Months and Not Later Than Two Years | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
Zero cost collars | Later Than Two Year Not Later Than Two Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than Two Year Not Later Than Two Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
Zero cost collars | Later Than Two Year Six Months Not Later Than Three Year | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Zero cost collars | Later Than Two Year Six Months Not Later Than Three Year | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 0
Rand Gold Forward Hedging Contracts  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 1,707
Rand Gold Forward Hedging Contracts | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 1,669
Rand Gold Forward Hedging Contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 1,735
Rand Gold Forward Hedging Contracts | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 1,792
Rand Gold Forward Hedging Contracts | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 0
Rand Gold Forward Hedging Contracts | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 0
Rand Gold Forward Hedging Contracts | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 0
US$ Gold Forward Hedging Contracts  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 2,703
US$ Gold Forward Hedging Contracts | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 2,631
US$ Gold Forward Hedging Contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 2,765
US$ Gold Forward Hedging Contracts | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 2,760
US$ Gold Forward Hedging Contracts | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 0
US$ Gold Forward Hedging Contracts | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 0
US$ Gold Forward Hedging Contracts | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 0
Rand Gold Zero Cost Collars | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,138
Rand Gold Zero Cost Collars | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,404
Rand Gold Zero Cost Collars | Due between 0 to six months (c) | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 1,845
Rand Gold Zero Cost Collars | Due between 0 to six months (c) | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,089
Rand Gold Zero Cost Collars | Due between six to 12 months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,019
Rand Gold Zero Cost Collars | Due between six to 12 months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,282
Rand Gold Zero Cost Collars | Later Than One Year Not Later Than One Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,059
Rand Gold Zero Cost Collars | Later Than One Year Not Later Than One Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,320
Rand Gold Zero Cost Collars | Later Than One Year Six Months and Not Later Than Two Years | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,339
Rand Gold Zero Cost Collars | Later Than One Year Six Months and Not Later Than Two Years | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,621
Rand Gold Zero Cost Collars | Later Than Two Year Not Later Than Two Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,609
Rand Gold Zero Cost Collars | Later Than Two Year Not Later Than Two Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,886
Rand Gold Zero Cost Collars | Later Than Two Year Six Months Not Later Than Three Year | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,644
Rand Gold Zero Cost Collars | Later Than Two Year Six Months Not Later Than Three Year | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / kg 2,960
US Gold Zero Cost Collars | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,575
US Gold Zero Cost Collars | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,969
US Gold Zero Cost Collars | Due between 0 to six months (c) | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,308
US Gold Zero Cost Collars | Due between 0 to six months (c) | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,673
US Gold Zero Cost Collars | Due between six to 12 months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,476
US Gold Zero Cost Collars | Due between six to 12 months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,878
US Gold Zero Cost Collars | Later Than One Year Not Later Than One Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,199
US Gold Zero Cost Collars | Later Than One Year Not Later Than One Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,540
US Gold Zero Cost Collars | Later Than One Year Six Months and Not Later Than Two Years | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 3,951
US Gold Zero Cost Collars | Later Than One Year Six Months and Not Later Than Two Years | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 4,398
US Gold Zero Cost Collars | Later Than Two Year Not Later Than Two Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 4,423
US Gold Zero Cost Collars | Later Than Two Year Not Later Than Two Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 4,848
US Gold Zero Cost Collars | Later Than Two Year Six Months Not Later Than Three Year | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 4,890
US Gold Zero Cost Collars | Later Than Two Year Six Months Not Later Than Three Year | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 5,456
Total Gold Contracts  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 781
Total Gold Contracts | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 210
Total Gold Contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 201
Total Gold Contracts | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 138
Total Gold Contracts | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 125
Total Gold Contracts | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 70
Total Gold Contracts | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 37
US$ silver contracts  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 2,110
US$ silver contracts | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 46.29
US$ silver contracts | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 52.35
US$ silver contracts | Due between 0 to six months (c)  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 660
US$ silver contracts | Due between 0 to six months (c) | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 32.16
US$ silver contracts | Due between 0 to six months (c) | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 36.45
US$ silver contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 620
US$ silver contracts | Due between six to 12 months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 36.23
US$ silver contracts | Due between six to 12 months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 41.02
US$ silver contracts | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 540
US$ silver contracts | Later Than One Year Not Later Than One Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 59.98
US$ silver contracts | Later Than One Year Not Later Than One Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 67.33
US$ silver contracts | Later Than One Year Six Months and Not Later Than Two Years  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 290
US$ silver contracts | Later Than One Year Six Months and Not Later Than Two Years | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 74.44
US$ silver contracts | Later Than One Year Six Months and Not Later Than Two Years | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 84.85
US$ silver contracts | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 0
US$ silver contracts | Later Than Two Year Not Later Than Two Year Six Months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 0
US$ silver contracts | Later Than Two Year Not Later Than Two Year Six Months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 0
US$ silver contracts | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 0
US$ silver contracts | Later Than Two Year Six Months Not Later Than Three Year | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 0
US$ silver contracts | Later Than Two Year Six Months Not Later Than Three Year | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 0