v3.26.3
Business Combinations, Gain on bargain purchase (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 30, 2025
Aug. 29, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Gain on bargain purchase [Abstract]          
Total consideration transferred $ 201,791        
Settlement of pre-existing contractual arrangement (137,000)        
Fair value of identifiable net assets (29,937)        
Gain on bargain purchase (33,109)   $ (33,109) [1] $ 0 [1],[2] $ 0 [1],[2]
Sayona Quebec Inc [Member]          
Gain on bargain purchase [Abstract]          
Buy-out of non-controlling interest in Sayona Quebec $ (67,963) [3]     $ (37,800)  
Purchase price allocation [Abstract]          
Ownership interest   75.00% 100.00% [4] 75.00% [4] 75.00% [4]
Percentage of non-controlling interest   25.00%      
[1] Adjustment to profit/(loss) which is reported as part of ‘Group / unallocated items and eliminations’. Refer to Note 30 (d) for further details.
[2] Refer to Note 2 (a) for details on translation of prior period comparatives to United States dollars to conform with changes in presentation currency.
[3] As at 30 June 2025, the Group recognised Piedmont’s non-controlling interest in Sayona Québec of $37.8 million.
[4] Non-controlling ownership interest of 25 per cent is held by Piedmont Lithium Québec Holdings Inc.