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v3.25.2

Acquisition and disposals - Narrative (Detail) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 4 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 19, 2025 | May 08, 2025 | Mar. 06, 2025 | Jun. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Oct. 09, 2024
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Transaction costs |  |  |  |  | $ 100 |  |
Salar de Maricunga SpA |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) | 49.99% |  |  |  |  |  |
Funding towards additional studies and resource analysis | $ 350 |  |  |  |  |  |
Salar de Maricunga SpA | Forecast |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Future investment towards construction costs |  |  |  | $ 500 | 500 |  |
Future investment for delivery of first lithium by the end of 2030 |  |  |  | 50 | $ 50 |  |
Salar de Maricunga SpA | Corporación Nacional Del Cobre de Chile |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) | 50.01% |  |  |  |  |  |
Sumitomo Metal Mining Co (SMM) |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Percentage of share of assets and liabilities |  | 30.00% |  |  |  |  |
Receivable due |  | $ 430 |  |  |  |  |
Proposed upfront contingent consideration |  | 195 |  |  |  |  |
Deferred consideration contingent on future milestones |  | $ 235 |  |  |  |  |
Winning Consortium Simandou Railway Pte Ltd And Winning Consortium Simandou Ports Pte Ltd |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interest in associates, percent acquired |  |  |  |  |  | 34.00% |
Boyne Smelters Limited |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  | 14.11% |
Boyne Smelters Limited | Ordinary shares |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interest in associate |  |  |  |  |  | 73.50% |
New Zealand Aluminium Smelters Limited |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Proportion of ownership interest in subsidiary |  |  |  |  |  | 100.00% |
Arcadium Lithium Plc |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  | 100.00%
Acquisition price, per share (usd per share) |  |  |  |  |  |  | $ 5.85
Contributed revenue since acquisition date |  |  |  | 308 |  |  |
Loss to profit before tax |  |  |  | 50 |  |  |
Amortisation charge for provisional purchase price allocation adjustments |  |  |  | $ 82 |  |  |
Total cash consideration, excluding cash and cash equivalents acquired |  |  | $ 6,700 |  |  |  |
Cash payment in consideration of equity to shareholders of Arcadium Lithium plc |  |  | 6,300 |  |  |  |
Paid to holders of convertible loan notes |  |  | 400 |  |  |  |
Increase in net debt after acquisition |  |  | 7,600 |  |  |  |
Net debt on acquisition date |  |  | 7,400 |  |  |  |
Debt advancement prior to acquisition |  |  | $ 200 |  |  |  |
New Zealand Aluminium Smelters Limited |  |  |  |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  | 20.64% |

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