Segment Information (Details 7) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 681	$ 710
Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	566	595
All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	57	54
Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	31	35
Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	27	26
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	363	387
Machinery, Energy & Transportation | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	468	491
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	363	387
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	57	54
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	31	35
Machinery, Energy & Transportation | Business | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	17	15
Financial Products | Business
Reconciliation of Depreciation and amortization
Total depreciation and amortization	213	219
Financial Products | Business | Reportable Segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	203	208
Financial Products | Business | All Other operating segments
Reconciliation of Depreciation and amortization
Total depreciation and amortization	0	0
Financial Products | Business | Cost Centers
Reconciliation of Depreciation and amortization
Total depreciation and amortization	0	0
Financial Products | Business | Other
Reconciliation of Depreciation and amortization
Total depreciation and amortization	$ 10	$ 11