v3.25.3
Derivative Financial Instruments - Disclosure of Open Position at the Reporting Date (Details)
oz in Thousands, R / kg in Thousands, $ in Millions
Jun. 30, 2025
USD ($)
oz
$ / oz
$ / Ounce
R / $
R / kg
Rand Gold Forward Hedging Contracts | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 314
Rand Gold Forward Hedging Contracts | Cash flow hedges | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 156
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) 92
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) 36
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) 20
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) 10
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) 45
US$ Gold Forward Hedging Contracts | Cash flow hedges | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 19
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) 13
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) 6
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) 6
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) 1
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) 432
Rand Gold Zero Cost Collars | Cash flow hedges | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 42
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) 100
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) 88
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) 100
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) 62
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) 40
US Gold Zero Cost Collars | Cash flow hedges  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 72
US Gold Zero Cost Collars | Cash flow hedges | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Nominal amount of hedging instrument (oz) 11
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) 18
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) 13
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) 12
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) 11
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) 7
Zero cost collars  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 226
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 / $ 18.54
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 / $ 20.54
Zero cost collars | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 120
Zero cost collars | Due between 0 to six months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 18.45
Zero cost collars | Due between 0 to six months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | R / $ 20.45
Zero cost collars | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 74
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 / $ 18.58
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 / $ 20.58
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 | $ $ 28
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 / $ 18.73
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 / $ 20.74
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 | $ $ 4
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 / $ 19.09
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 / $ 21.10
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
Forward contracts  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 53
Price of derivative instrument at fair value through profit and loss | R / $ 19.98
Forward contracts | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 42
Price of derivative instrument at fair value through profit and loss | R / $ 19.94
Forward contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 11
Price of derivative instrument at fair value through profit and loss | R / $ 20.15
Forward contracts | Later Than One Year Not Later Than One Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
Price of derivative instrument at fair value through profit and loss | R / $ 0
Forward contracts | 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
Price of derivative instrument at fair value through profit and loss | R / $ 0
Forward contracts | Later Than Two Year Not Later Than Two Year Six Months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
Price of derivative instrument at fair value through profit and loss | R / $ 0
Forward contracts | Later Than Two Year Six Months Not Later Than Three Year  
Disclosure of detailed information about financial instruments [line items]  
Derivative, notional amount | $ $ 0
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 1,510
Rand Gold Forward Hedging Contracts | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | R / kg 1,396
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 1,561
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 1,669
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 1,735
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 1,792
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 2,468
US$ Gold Forward Hedging Contracts | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Price of hedging instrument | $ / oz 2,264
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 2,531
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 2,631
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 2,765
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 2,760
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 1,757
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 1,996
Rand Gold Zero Cost Collars | Due between 0 to 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 1,595
Rand Gold Zero Cost Collars | Due between 0 to 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 1,835
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 1,706
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 1,940
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 1,633
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 1,861
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 1,770
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 2,005
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 1,868
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 2,119
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 2,123
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 2,385
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 2,796
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 3,118
US Gold Zero Cost Collars | Due between 0 to six months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 2,589
US Gold Zero Cost Collars | Due between 0 to six months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / Ounce 2,893
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 2,817
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 3,145
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 2,597
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 2,894
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 2,778
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 3,093
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 2,874
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 3,197
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 3,348
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 3,733
Total Gold Contracts  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 863
Total Gold Contracts | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 228
Total Gold Contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 223
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 143
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 138
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 84
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 47
US$ silver contracts  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 2,480
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 31.22
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 35.04
US$ silver contracts | Due between 0 to six months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 660
US$ silver contracts | Due between 0 to six months | Floor  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 28.28
US$ silver contracts | Due between 0 to six months | Cap  
Disclosure of detailed information about financial instruments [line items]  
Price of derivative instrument at fair value through profit and loss | $ / oz 31.38
US$ silver contracts | Due between six to 12 months  
Disclosure of detailed information about financial instruments [line items]  
Derivative, Nonmonetary Notional Amount 660
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 30.15
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 33.52
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 660
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 32.16
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 36.45
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 500
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 35.25
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 40.01
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