Segment information - Summary of key performance measures by segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 6,533	$ 6,427
Adjusted EBITDA	445	386
Americas Materials Solutions
Segment Reporting Information [Line Items]
Revenues	2,202	1,895
Adjusted EBITDA	15	(35)
Americas Building Solutions
Segment Reporting Information [Line Items]
Revenues	1,693	1,661
Adjusted EBITDA	308	301
Europe Materials Solutions
Segment Reporting Information [Line Items]
Revenues	2,013	2,178
Adjusted EBITDA	90	68
Europe Building Solutions
Segment Reporting Information [Line Items]
Revenues	625	693
Adjusted EBITDA	$ 32	$ 52