Reconciliation of assets (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Reconciliation of Assets
Assets	$ 76,741	$ 78,453
Inventory Methodology Difference	(2,560)	(2,426)
Reportable Segments
Reconciliation of Assets
Assets	53,461	55,467
All Other operating segments
Reconciliation of Assets
Assets	1,610	1,728
Cash and Short Term Investments
Reconciliation of Assets
Assets	8,512	7,299
Deferred Income Taxes
Reconciliation of Assets
Assets	1,339	1,294
Goodwill and Intangible Assets
Reconciliation of Assets
Assets	4,737	4,435
Property Plant and Equipment-Net and Other Assets
Reconciliation of Assets
Assets	2,608	2,529
Liabilities Included in Segment Assets
Reconciliation of Assets
Assets	7,720	8,541
Other
Reconciliation of Assets
Assets	(686)	(414)
Construction Industries | Reportable Segments
Reconciliation of Assets
Assets	4,507	4,601
Resource Industries | Reportable Segments
Reconciliation of Assets
Assets	6,188	6,505
Energy & Transportation | Reportable Segments
Reconciliation of Assets
Assets	8,752	8,548
Financial Products Segment | Reportable Segments
Reconciliation of Assets
Assets	$ 34,014	$ 35,813