Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Net sales	$ 868	$ 731	$ 1,628	$ 1,469
Cost of goods sold	813	652	1,529	1,291
Gross profit	55	79	99	178
Reportable Segment
Segment Reporting [Line Items]
Net sales	868	731	1,628	1,469
Gross profit	55	79	99	178
Reportable Segment \| Idle facility and lower of cost or net realizable value charges
Segment Reporting [Line Items]
Cost of goods sold	62	25	100	50
Reportable Segment \| Other cost of goods
Segment Reporting [Line Items]
Cost of goods sold	$ 751	$ 627	$ 1,429	$ 1,241

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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