Segment information - Summary of key performance measures by segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenues	$ 9,654	$ 9,709	$ 16,187	$ 16,136
Adjusted EBITDA	2,255	2,014	2,700	2,400
Americas Materials Solutions
Segment Reporting Information [Line Items]
Revenues	4,406	4,164	6,608	6,059
Adjusted EBITDA	1,193	935	1,208	900
Americas Building Solutions
Segment Reporting Information [Line Items]
Revenues	2,116	2,148	3,809	3,809
Adjusted EBITDA	476	474	784	775
Europe Materials Solutions
Segment Reporting Information [Line Items]
Revenues	2,404	2,614	4,417	4,792
Adjusted EBITDA	499	515	589	583
Europe Building Solutions
Segment Reporting Information [Line Items]
Revenues	728	783	1,353	1,476
Adjusted EBITDA	$ 87	$ 90	$ 119	$ 142