Related Parties - Schedule of MGT Loan Repayments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Related Party Transaction [Line Items]
Interest expense	$ 56	$ 45	$ 109	$ 87
Cristal \| MGT Loan \| Related party payables
Related Party Transaction [Line Items]
Interest expense	0	1	0	1
Loan Repayment via MGT delivered to ATTM	$ 2	$ 1	$ 3	$ 3

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