Segment information - Summary of key performance measures by segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment information - Consolidated Statements of Income
Revenue	$ 37,447	$ 35,572	$ 34,949
Less:
Labor	7,847	7,329	6,844
Energy costs	1,980	1,847	2,241
Other segment items	19,939	19,466	19,688
Adjusted EBITDA	7,681	6,930	6,176
Americas Materials Solutions
Segment information - Consolidated Statements of Income
Revenue	17,029	16,173	15,435
Less:
Labor	3,665	3,493	3,274
Energy costs	796	743	805
Other segment items	8,566	8,192	8,297
Adjusted EBITDA	4,002	3,745	3,059
Americas Building Solutions
Segment information - Consolidated Statements of Income
Revenue	7,122	7,059	7,017
Less:
Labor	1,513	1,447	1,306
Energy costs	123	121	122
Other segment items	4,012	4,102	4,147
Adjusted EBITDA	1,474	1,389	1,442
International Solutions
Segment information - Consolidated Statements of Income
Revenue	13,296	12,340	12,497
Less:
Labor	2,669	2,389	2,264
Energy costs	1,061	983	1,314
Other segment items	7,361	7,172	7,244
Adjusted EBITDA	$ 2,205	$ 1,796	$ 1,675