Reconciliations of depreciation and amortization (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 614	$ 641
Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	515	543
All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	62	52
Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	33	32
Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	4	14
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	310	337
Machinery, Energy & Transportation | Operating Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	402	424
Machinery, Energy & Transportation | Operating Segments | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	310	337
Machinery, Energy & Transportation | Operating Segments | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	62	52
Machinery, Energy & Transportation | Operating Segments | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	33	32
Machinery, Energy & Transportation | Operating Segments | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	(3)	3
Financial Products | Operating Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	212	217
Financial Products | Operating Segments | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	205	206
Financial Products | Operating Segments | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	0	0
Financial Products | Operating Segments | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	0	0
Financial Products | Operating Segments | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 7	$ 11