Segment Information (Details 8) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reconciliation of Capital expenditures
Total capital expenditures	$ 757	$ 509
Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	588	429
All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	11	20
Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	14	9
Timing
Reconciliation of Capital expenditures
Total capital expenditures	175	88
Other
Reconciliation of Capital expenditures
Total capital expenditures	(31)	(37)
Consolidating Adjustments
Reconciliation of Capital expenditures
Total capital expenditures	(4)	(3)
Consolidating Adjustments | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Consolidating Adjustments | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Consolidating Adjustments | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Consolidating Adjustments | Timing
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Consolidating Adjustments | Other
Reconciliation of Capital expenditures
Total capital expenditures	(4)	(3)
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	227	158
Machinery, Energy & Transportation | Business
Reconciliation of Capital expenditures
Total capital expenditures	323	209
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	227	158
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	11	20
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	14	9
Machinery, Energy & Transportation | Business | Timing
Reconciliation of Capital expenditures
Total capital expenditures	175	88
Machinery, Energy & Transportation | Business | Other
Reconciliation of Capital expenditures
Total capital expenditures	(104)	(66)
Financial Products | Business
Reconciliation of Capital expenditures
Total capital expenditures	438	303
Financial Products | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	361	271
Financial Products | Business | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Financial Products | Business | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Financial Products | Business | Timing
Reconciliation of Capital expenditures
Total capital expenditures	0	0
Financial Products | Business | Other
Reconciliation of Capital expenditures
Total capital expenditures	$ 77	$ 32