Segment information - Additions to property, plant and equipment and intangible assets for each of the segments (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	$ 2,008	$ 1,716
Americas Materials Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	829	769
Americas Building Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	401	336
International Solutions
Segment Reporting Information [Line Items]
Total property, plant and equipment and intangible asset additions	$ 778	$ 611