Segment information - Disaggregation of revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Sales and revenue by geographic region
Total sales and revenues	$ (64,809)	$ (67,060)	$ (59,427)
Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	5,555	5,427	5,163
Corporate Items and Eliminations
Sales and revenue by geographic region
Total sales and revenues	812	749	448
Corporate Reconciling Items and Eliminations
Sales and revenue by geographic region
Total sales and revenues	6,367	6,176	5,611
North America
Sales and revenue by geographic region
Total sales and revenues	(34,397)	(34,606)	(27,981)
North America | Corporate Items and Eliminations
Sales and revenue by geographic region
Total sales and revenues	503	480	234
Latin America
Sales and revenue by geographic region
Total sales and revenues	(6,708)	(6,665)	(6,738)
Latin America | Corporate Items and Eliminations
Sales and revenue by geographic region
Total sales and revenues	87	80	79
EAME
Sales and revenue by geographic region
Total sales and revenues	(12,316)	(13,673)	(12,814)
EAME | Corporate Items and Eliminations
Sales and revenue by geographic region
Total sales and revenues	107	88	52
Asia/Pacific
Sales and revenue by geographic region
Total sales and revenues	(11,388)	(12,116)	(11,894)
Asia/Pacific | Corporate Items and Eliminations
Sales and revenue by geographic region
Total sales and revenues	115	101	83
Segments Excluding All Other Segments | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(65,503)	(67,678)	(59,730)
Segments Excluding All Other Segments | Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	5,248	5,109	4,858
Segments Excluding All Other Segments | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(70,751)	(72,787)	(64,588)
Segments Excluding All Other Segments | North America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(34,844)	(35,021)	(28,151)
Segments Excluding All Other Segments | Latin America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(6,795)	(6,746)	(6,815)
Segments Excluding All Other Segments | EAME | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(12,411)	(13,743)	(12,932)
Segments Excluding All Other Segments | Asia/Pacific | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(11,453)	(12,168)	(11,832)
Construction Industries | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(25,344)	(27,294)	(25,127)
Construction Industries | Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	111	124	142
Construction Industries | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(25,455)	(27,418)	(25,269)
Construction Industries | North America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(14,576)	(15,343)	(12,367)
Construction Industries | Latin America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(2,553)	(2,307)	(2,843)
Construction Industries | EAME | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(4,315)	(5,254)	(5,099)
Construction Industries | Asia/Pacific | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(3,900)	(4,390)	(4,818)
Resource Industries | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(12,018)	(13,244)	(12,013)
Resource Industries | Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	371	339	301
Resource Industries | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(12,389)	(13,583)	(12,314)
Resource Industries | North America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(4,561)	(5,256)	(4,531)
Resource Industries | Latin America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(2,077)	(2,040)	(1,840)
Resource Industries | EAME | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(1,804)	(2,069)	(2,205)
Resource Industries | Asia/Pacific | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(3,576)	(3,879)	(3,437)
Energy & Transportation
Sales and revenue by geographic region
Total sales and revenues	(24,088)	(23,355)	(19,337)
Energy & Transportation | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(24,088)	(23,355)	(19,337)
Energy & Transportation | Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	4,766	4,646	4,415
Energy & Transportation | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(28,854)	(28,001)	(23,752)
Energy & Transportation | North America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(13,005)	(11,982)	(9,175)
Energy & Transportation | Latin America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(1,763)	(1,983)	(1,784)
Energy & Transportation | EAME | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(5,787)	(5,929)	(5,232)
Energy & Transportation | Asia/Pacific | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(3,533)	(3,461)	(3,146)
Financial Products Segment | Related Party
Sales and revenue by geographic region
Total sales and revenues	(711)	(690)	(478)
Financial Products Segment | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(4,053)	(3,785)	(3,253)
Financial Products Segment | Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	0	0	0
Financial Products Segment | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(4,053)	(3,785)	(3,253)
Financial Products Segment | North America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(2,702)	(2,440)	(2,078)
Financial Products Segment | Latin America | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(402)	(416)	(348)
Financial Products Segment | EAME | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(505)	(491)	(396)
Financial Products Segment | Asia/Pacific | Operating Segments Excluding Intersegment Eliminations
Sales and revenue by geographic region
Total sales and revenues	(444)	(438)	(431)
Other Operating Segment
Sales and revenue by geographic region
Total sales and revenues	(118)	(131)	(145)
Other Operating Segment | Intersegment Sales and Revenues
Sales and revenue by geographic region
Total sales and revenues	307	318	305
Other Operating Segment | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(425)	(449)	(450)
Other Operating Segment | North America | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(56)	(65)	(64)
Other Operating Segment | Latin America | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	0	1	(2)
Other Operating Segment | EAME | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	(12)	(18)	66
Other Operating Segment | Asia/Pacific | Operating Segments
Sales and revenue by geographic region
Total sales and revenues	$ (50)	$ (49)	$ (145)