Reconciliation of Depreciation and amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	$ 2,577	$ 2,766	$ 2,877
Reportable segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	2,213	2,303	2,387
All Other operating segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	210	225	220
Cost Centers
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	136	130	143
Other
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	18	108	127
Machinery, Energy & Transportation | Reportable segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	1,384	1,469	1,567
Machinery, Energy & Transportation | Business
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	1,713	1,895	2,016
Machinery, Energy & Transportation | Business | Reportable segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	1,384	1,469	1,567
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	210	225	220
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	136	130	143
Machinery, Energy & Transportation | Business | Other
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	(17)	71	86
Financial Products | Business
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	864	871	861
Financial Products | Business | Reportable segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	829	834	820
Financial Products | Business | All Other operating segments
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	0	0	0
Financial Products | Business | Cost Centers
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	0	0	0
Financial Products | Business | Other
Reconciliation of Depreciation and amortization:
Total depreciation and amortization	$ 35	$ 37	$ 41