Sales and revenues by geographic region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Sales and revenues by geographic region
Sales and revenues	$ 12,889	$ 9,997	$ 24,776	$ 20,632
Reportable Segments
Sales and revenues by geographic region
Sales and revenues	13,984	10,786	26,927	22,339
Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	12,968	10,046	24,925	20,769
Reportable Segments | Segment Reconciling Items
Sales and revenues by geographic region
Sales and revenues	1,016	740	2,002	1,570
Corporate Items and Eliminations
Sales and revenues by geographic region
Sales and revenues	(1,223)	(904)	(2,409)	(1,931)
Corporate Items and Eliminations | Corporate, Non-Segment
Sales and revenues by geographic region
Sales and revenues	(113)	(77)	(221)	(193)
Corporate Items and Eliminations | Intersegment Eliminations
Sales and revenues by geographic region
Sales and revenues	(1,110)	(827)	(2,188)	(1,738)
North America
Sales and revenues by geographic region
Sales and revenues	5,719	4,386	10,710	9,366
North America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	5,777	4,420	10,818	9,464
North America | Corporate Items and Eliminations | Corporate, Non-Segment
Sales and revenues by geographic region
Sales and revenues	(69)	(41)	(132)	(110)
Latin America
Sales and revenues by geographic region
Sales and revenues	1,221	730	2,325	1,622
Latin America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	1,232	739	2,347	1,643
Latin America | Corporate Items and Eliminations | Corporate, Non-Segment
Sales and revenues by geographic region
Sales and revenues	(12)	(10)	(23)	(24)
EAME
Sales and revenues by geographic region
Sales and revenues	3,102	2,333	5,845	4,770
EAME | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	3,108	2,337	5,856	4,776
EAME | Corporate Items and Eliminations | Corporate, Non-Segment
Sales and revenues by geographic region
Sales and revenues	(10)	(9)	(18)	(22)
Asia/Pacific
Sales and revenues by geographic region
Sales and revenues	2,847	2,548	5,896	4,874
Asia/Pacific | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	2,851	2,550	5,904	4,886
Asia/Pacific | Corporate Items and Eliminations | Corporate, Non-Segment
Sales and revenues by geographic region
Sales and revenues	(22)	(17)	(48)	(37)
Construction Industries | Reportable Segments
Sales and revenues by geographic region
Sales and revenues	5,656	4,048	11,115	8,354
Construction Industries | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	5,603	4,032	11,044	8,344
Construction Industries | Reportable Segments | Segment Reconciling Items
Sales and revenues by geographic region
Sales and revenues	53	16	71	10
Construction Industries | North America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	2,498	1,604	4,624	3,689
Construction Industries | Latin America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	430	212	822	477
Construction Industries | EAME | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	1,291	933	2,372	1,822
Construction Industries | Asia/Pacific | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	1,384	1,283	3,226	2,356
Resource Industries | Reportable Segments
Sales and revenues by geographic region
Sales and revenues	2,579	1,826	4,795	3,910
Resource Industries | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	2,471	1,710	4,568	3,689
Resource Industries | Reportable Segments | Segment Reconciling Items
Sales and revenues by geographic region
Sales and revenues	108	116	227	221
Resource Industries | North America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	799	507	1,456	1,203
Resource Industries | Latin America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	487	270	892	590
Resource Industries | EAME | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	525	379	999	774
Resource Industries | Asia/Pacific | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	660	554	1,221	1,122
Energy & Transportation
Sales and revenues by geographic region
Sales and revenues	4,120	3,541	7,778	7,159
Energy & Transportation | Reportable Segments
Sales and revenues by geographic region
Sales and revenues	4,975	4,149	9,482	8,498
Energy & Transportation | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	4,120	3,541	7,778	7,159
Energy & Transportation | Reportable Segments | Segment Reconciling Items
Sales and revenues by geographic region
Sales and revenues	855	608	1,704	1,339
Energy & Transportation | North America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	1,992	1,816	3,774	3,554
Energy & Transportation | Latin America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	250	197	506	446
Energy & Transportation | EAME | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	1,196	929	2,289	1,982
Energy & Transportation | Asia/Pacific | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	682	599	1,209	1,177
Financial Products Segment
Sales and revenues by geographic region
Revenue from Related Parties	92	88	176	193
Financial Products Segment | Reportable Segments
Sales and revenues by geographic region
Sales and revenues	774	763	1,535	1,577
Financial Products Segment | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	774	763	1,535	1,577
Financial Products Segment | Reportable Segments | Segment Reconciling Items
Sales and revenues by geographic region
Sales and revenues	0	0	0	0
Financial Products Segment | North America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	488	493	964	1,018
Financial Products Segment | Latin America | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	65	60	127	130
Financial Products Segment | EAME | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	96	96	196	198
Financial Products Segment | Asia/Pacific | Reportable Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	125	114	248	231
All Other Operating Segments
Sales and revenues by geographic region
Sales and revenues	128	115	258	224
All Other Operating Segments | Operating Segments
Sales and revenues by geographic region
Sales and revenues	34	28	72	56
All Other Operating Segments | Segment Reconciling Items
Sales and revenues by geographic region
Sales and revenues	94	87	186	168
All Other Operating Segments | North America | Operating Segments
Sales and revenues by geographic region
Sales and revenues	11	7	24	12
All Other Operating Segments | Latin America | Operating Segments
Sales and revenues by geographic region
Sales and revenues	1	1	1	3
All Other Operating Segments | EAME | Operating Segments
Sales and revenues by geographic region
Sales and revenues	4	5	7	16
All Other Operating Segments | Asia/Pacific | Operating Segments
Sales and revenues by geographic region
Sales and revenues	$ 18	$ 15	$ 40	$ 25