Exploration and Evaluation Assets - California Properties (Details) - USD ($)	6 Months Ended	12 Months Ended
Dec. 31, 2024	Dec. 31, 2025	Jun. 30, 2024
Share Capital
Impairment expense	$ 19,700,000	$ 26,500,000	$ 0
California Properties
Share Capital
Impairment expense	$ 19,700,000

The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2025-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2025-01-01
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