Segment information - Schedule of Capital Expenditures (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Segment Reporting [Line Items] | ||||
| Total capital expenditures | $ 244 | $ 235 | $ 520 | $ 448 |
| Building Materials | ||||
| Segment Reporting [Line Items] | ||||
| Total capital expenditures | 189 | 202 | 395 | 388 |
| Building Envelope | ||||
| Segment Reporting [Line Items] | ||||
| Total capital expenditures | $ 55 | $ 33 | $ 125 | $ 60 |
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- Definition Amount of expenditure for addition to long-lived asset included in determination of segment asset by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Long-lived asset excludes financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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