Segment Information (Details 7) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 686	$ 720	$ 1,367	$ 1,430
Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	574	596	1,140	1,191
All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	58	56	115	110
Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	32	35	63	70
Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	22	33	49	59
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	362	392	725	779
Machinery, Energy & Transportation | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	465	507	933	998
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	362	392	725	779
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	58	56	115	110
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	32	35	63	70
Machinery, Energy & Transportation | Business | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	13	24	30	39
Financial Products | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	221	213	434	432
Financial Products | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	212	204	415	412
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	$ 9	$ 19	$ 20