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Segment information - Reconciliations of Depreciation and Amortization (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Reconciliation of Depreciation and amortization:    
Depreciation and amortization $ 540 $ 524
Operating Segments    
Reconciliation of Depreciation and amortization:    
Depreciation and amortization 460 441
Operating Segments | Construction Industries    
Reconciliation of Depreciation and amortization:    
Depreciation and amortization 63 56
Operating Segments | Resource Industries    
Reconciliation of Depreciation and amortization:    
Depreciation and amortization 66 63
Operating Segments | Energy & Transportation    
Reconciliation of Depreciation and amortization:    
Depreciation and amortization 153 137
Operating Segments | Financial Products Segment    
Reconciliation of Depreciation and amortization:    
Depreciation and amortization 178 185
Operating Segments | All Other Segment    
Reconciliation of Depreciation and amortization:    
Depreciation and amortization 58 61
Corporate Items    
Items not included in segment depreciation and amortization:    
Cost centers 24 23
Other $ (2) $ (1)