Segment Information - Reconciliations of Consolidated Profit Before Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	$ 3,515	$ 2,558	$ 9,801	$ 6,653
Operating Segments | Reportable Segments
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	3,961	2,870	11,856	7,284
Operating Segments | Reportable Segments | Construction Industries
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	1,847	1,209	5,440	3,255
Operating Segments | Reportable Segments | Resource Industries
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	730	506	2,234	1,222
Operating Segments | Reportable Segments | Energy & Transportation
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	1,181	935	3,507	2,132
Operating Segments | Reportable Segments | Financial Products Segment
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	203	220	675	675
Operating Segments | All Other operating segments
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	21	8	42	42
Intersegment Sales and Revenues | Cost centers
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	10	(37)	53	1
Intersegment Sales and Revenues | Corporate costs
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(265)	(168)	(714)	(670)
Intersegment Sales and Revenues | Timing
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	22	(84)	(89)	(129)
Intersegment Sales and Revenues | Restructuring costs
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(46)	(49)	(688)	(90)
Intersegment Sales and Revenues | Inventory/cost of sales
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(2)	138	137	407
Intersegment Sales and Revenues | Postretirement benefit expense
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(13)	82	(84)	293
Intersegment Sales and Revenues | Stock-based compensation expense
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(60)	(55)	(178)	(162)
Intersegment Sales and Revenues | Financing costs
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(13)	(75)	(115)	(269)
Intersegment Sales and Revenues | Currency
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	78	53	106	315
Intersegment Sales and Revenues | Other income/expense methodology differences
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	(164)	(109)	(468)	(287)
Intersegment Sales and Revenues | Other methodology differences
Reconciliation of Consolidated profit (loss) before taxes
Reclassifications before tax	$ (14)	$ (16)	$ (57)	$ (82)