Goodwill - Schedule of changes in carrying amount of goodwill (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 9,158	$ 9,199	$ 9,199
Acquisitions	1,025	64	398
Foreign currency translation adjustment	(58)	45	89
Divestitures	(197)
Impairment charge for the period			(327)
Reclassified as held for sale	197		(201)
Goodwill, ending balance	10,125	9,308	9,158
Americas Materials Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	4,417	4,407	4,407
Acquisitions	976	6	34
Foreign currency translation adjustment	(12)	(3)	8
Divestitures	0
Impairment charge for the period			(32)
Reclassified as held for sale	0		0
Goodwill, ending balance	5,381	4,410	4,417
Americas Building Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	2,752	2,517	2,517
Acquisitions	52	(10)	240
Foreign currency translation adjustment	(4)	0	(5)
Divestitures	0
Impairment charge for the period			0
Reclassified as held for sale	0		0
Goodwill, ending balance	2,800	2,507	2,752
Europe Materials Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	1,362	1,763	1,763
Acquisitions	(1)	1	38
Foreign currency translation adjustment	(27)	38	57
Divestitures	(197)
Impairment charge for the period			(295)
Reclassified as held for sale	197		(201)
Goodwill, ending balance	1,334	1,802	1,362
Europe Building Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	627	512	512
Acquisitions	(2)	67	86
Foreign currency translation adjustment	(15)	10	29
Divestitures	0
Impairment charge for the period			0
Reclassified as held for sale	0		0
Goodwill, ending balance	$ 610	$ 589	$ 627