Segment information - Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total assets for reportable segments	$ 53,984	$ 50,613	$ 48,105
Operating Segments
Segment Reporting Information [Line Items]
Total assets for reportable segments	49,929	45,534	43,145
Americas Materials Solutions \| Operating Segments
Segment Reporting Information [Line Items]
Total assets for reportable segments	22,993	21,474	21,226
Americas Building Solutions \| Operating Segments
Segment Reporting Information [Line Items]
Total assets for reportable segments	9,838	9,049	8,837
International Solutions \| Operating Segments
Segment Reporting Information [Line Items]
Total assets for reportable segments	$ 17,098	$ 15,011	$ 13,082

Amount of asset recognized for present right to economic benefit.

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+ Details