Segment information - Additions to property, plant and equipment and intangible assets for each of the segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	$ 683	$ 683
Americas Materials Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	307	240
Americas Building Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	100	199
International Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	$ 276	$ 244