Selected Segment Data - Identifiable Assets by Segment (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Segment Reporting [Line Items]
Assets	$ 2,646	$ 2,627
Total segment assets
Segment Reporting [Line Items]
Assets	1,986	1,950
Siding
Segment Reporting [Line Items]
Assets	1,472	1,419
OSB
Segment Reporting [Line Items]
Assets	513	531
Other
Segment Reporting [Line Items]
Assets	$ 661	$ 677

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

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.

+ References

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+ Details