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Segment information - Reconciliation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]        
Total Revenues $ 3,220 $ 3,243 $ 5,301 $ 5,409
Total cost of revenues 2,254 2,264 4,113 4,158
Unallocated corporate costs (72) (30) (102) (58)
Depreciation, depletion, accretion and amortization (221) (224) (439) (436)
Loss on impairments (2) (2) (2) (2)
Other (55) (23) (67) (35)
Interest income 22 4 36 15
Interest expense (143) (138) (275) (269)
Other non-operating income, net 1 0 2 4
Total reconciling items (470) (413) (847) (781)
Income before income tax expense and income from equity method investments: 549 620 416 564
Operating Segments        
Segment Reporting Information [Line Items]        
Total Revenues 3,220 3,243 5,301 5,409
Total cost of revenues 2,044 2,043 3,689 3,729
Total other segment expenses 157 167 349 335
Total Segment Adjusted EBITDA 1,019 1,033 1,263 1,345
Building Materials | Operating Segments        
Segment Reporting Information [Line Items]        
Total Revenues 2,250 2,274 3,579 3,698
Total cost of revenues 1,425 1,428 2,543 2,591
Total other segment expenses 67 76 158 163
Total Segment Adjusted EBITDA 758 770 878 944
Building Envelope        
Segment Reporting Information [Line Items]        
Total Revenues 970 969 1,722 1,711
Building Envelope | Operating Segments        
Segment Reporting Information [Line Items]        
Total Revenues 970 969 1,722 1,711
Total cost of revenues 619 615 1,146 1,138
Total other segment expenses 90 91 191 172
Total Segment Adjusted EBITDA $ 261 $ 263 $ 385 $ 401