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Goodwill and intangible assets, net - Schedule of Changes in Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 8,917
Acquisitions	18
Foreign currency translation adjustment	94
Goodwill, ending balance	9,029
Building Materials
Goodwill [Roll Forward]
Goodwill, beginning balance	4,891
Acquisitions	13
Foreign currency translation adjustment	94
Goodwill, ending balance	4,998
Building Envelope
Goodwill [Roll Forward]
Goodwill, beginning balance	4,026
Acquisitions	5
Foreign currency translation adjustment	0
Goodwill, ending balance	$ 4,031

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