Segment Information (Details 6) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 720	$ 754	$ 1,430	$ 1,494
Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	596	651	1,191	1,290
All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	56	53	110	105
Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	35	38	70	78
Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	33	12	59	21
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	392	438	779	872
Machinery, Energy & Transportation | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	507	531	998	1,056
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	392	438	779	872
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	56	53	110	105
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	35	38	70	78
Machinery, Energy & Transportation | Business | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	24	2	39	1
Financial Products | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	213	223	432	438
Financial Products | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	204	213	412	418
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	$ 9	$ 10	$ 20	$ 20