v3.25.3
Impairment of Non-Financial Assets, Impairment of Non-Current Assets (Excluding Goodwill) (Details) - AUD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Aug. 27, 2021
Impairment of non-current assets excluding goodwill [Abstract]        
Impairment and write down of non-financial assets [1] $ (271,310) $ (17,066) [2] $ 0 [2]  
Discount rate 10.00% 8.00%    
North American Lithium Inc. [Member]        
Impairment of non-current assets excluding goodwill [Abstract]        
Percentage of issued capital acquired       100.00%
Impairment and write down of non-financial assets $ 271,300 $ 0 $ 0  
Recoverable amount $ 156,700      
Discount rate 10.00%      
[1] The total impairment and write down of $271.3 million for the year ended 30 June 2025 relates to North American Lithium. The total impairment and write down of $17.1 million for the year ended 30 June 2024 relates to the Australian operations ($5.9 million), Corporate ($5.1 million), Vallée Lithium Project ($4.0 million), and various other individually immaterial projects ($2.1 million).
[2] Refer to Note 32 for details on restatement of prior period comparatives.