Reconciliations of depreciation and amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Depreciation and amortization:
Depreciation and amortization	$ 2,352	$ 2,432	$ 2,577
Operating Segments | Reportable Subsegments
Reconciliation of Depreciation and amortization:
Depreciation and amortization	1,983	2,029	2,205
Consolidating Adjustments | All Other operating segments
Reconciliation of Depreciation and amortization:
Depreciation and amortization	243	267	210
Consolidating Adjustments | Cost Centers
Reconciliation of Depreciation and amortization:
Depreciation and amortization	98	126	135
Consolidating Adjustments | Other
Reconciliation of Depreciation and amortization:
Depreciation and amortization	28	10	27
Construction Industries | Operating Segments | Reportable Subsegments
Reconciliation of Depreciation and amortization:
Depreciation and amortization	237	245	302
Resource Industries | Operating Segments | Reportable Subsegments
Reconciliation of Depreciation and amortization:
Depreciation and amortization	403	418	450
Energy & Transportation | Operating Segments | Reportable Subsegments
Reconciliation of Depreciation and amortization:
Depreciation and amortization	571	593	624
Financial Products Segment | Operating Segments | Reportable Subsegments
Reconciliation of Depreciation and amortization:
Depreciation and amortization	$ 772	$ 773	$ 829