Reconciliations of capital expenditures (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	$ 750	$ 679
Operating Segments | Reportable Segments
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	506	472
Operating Segments | Reportable Segments | Construction Industries
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	32	32
Operating Segments | Reportable Segments | Resource Industries
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	26	22
Operating Segments | Reportable Segments | Energy & Transportation
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	169	177
Operating Segments | Reportable Segments | Financial Products Segment
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	279	241
Intersegment Eliminations | All Other operating segments
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	26	16
Intersegment Eliminations | Cost Centers
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	22	9
Intersegment Eliminations | Timing
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	212	192
Intersegment Eliminations | Other
Reconciliation of Capital expenditures
Segment Reporting Information, Expenditure for Additions Long-Lived Assets	$ (16)	$ (10)