Segment Information (Details 6) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 723	$ 761	$ 2,153	$ 2,255
Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	597	652	1,788	1,942
All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	52	53	162	158
Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	36	39	106	117
Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	38	17	97	38
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	393	437	1,172	1,309
Machinery, Energy & Transportation | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	509	535	1,507	1,591
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	393	437	1,172	1,309
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	52	53	162	158
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	36	39	106	117
Machinery, Energy & Transportation | Business | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	28	6	67	7
Financial Products | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	214	226	646	664
Financial Products | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	204	215	616	633
Financial Products | Business | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	0	0	0	0
Financial Products | Business | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	0	0	0	0
Financial Products | Business | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 10	$ 11	$ 30	$ 31