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Related Parties - Schedule of Accrued Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Related Party Transaction [Line Items] |  |
Amount due for slag purchases | $ 254 | $ 274
Slagger | Purchases of Feedstock Material | Related party payables | Advanced Metal Industries Cluster Company Limited |  |
Related Party Transaction [Line Items] |  |
Amount due for slag purchases | $ 4 | $ 3

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