Segment information - Reconciliations of capital expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Capital expenditures from reportable segments:
Capital expenditures	$ 3,215	$ 3,092	$ 2,599
Operating Segments
Capital expenditures from reportable segments:
Capital expenditures	2,955	2,864	2,405
Operating Segments | Construction Industries
Capital expenditures from reportable segments:
Capital expenditures	323	376	271
Operating Segments | Resource Industries
Capital expenditures from reportable segments:
Capital expenditures	268	245	237
Operating Segments | Energy & Transportation
Capital expenditures from reportable segments:
Capital expenditures	1,279	944	756
Operating Segments | Financial Products Segment
Capital expenditures from reportable segments:
Capital expenditures	1,085	1,299	1,141
Operating Segments | Other Operating Segment
Capital expenditures from reportable segments:
Capital expenditures	245	260	219
Corporate Items and Eliminations
Items not included in segment capital expenditures:
Cost centers	193	102	76
Timing	(149)	(44)	(54)
Other	$ (29)	$ (90)	$ (47)