Related Parties - Schedule of Sales Outstanding Prepaid and Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Related Party Transaction [Line Items]
Due from ATTM for MGT deliveries	$ 176	$ 112
Advanced Metal Industries Cluster and Toho Titanium Metal Co. Ltd (ATTM) \| Receivable From MGT Product Sales \| Related party payables
Related Party Transaction [Line Items]
Due from ATTM for MGT deliveries	$ 10	$ 5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details