Segment Information (Details 8) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reconciliation of Capital expenditures
Total capital expenditures	$ 601	$ 513	$ 2,129	$ 1,637
Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	566	512	1,928	1,538
All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	63	26	101	71
Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	30	17	70	40
Timing
Reconciliation of Capital expenditures
Total capital expenditures	(5)	(21)	152	58
Other
Reconciliation of Capital expenditures
Total capital expenditures	(53)	(21)	(122)	(70)
Consolidating Adjustments
Reconciliation of Capital expenditures
Total capital expenditures	(33)	(9)	(73)	(17)
Consolidating Adjustments | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Consolidating Adjustments | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Consolidating Adjustments | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Consolidating Adjustments | Timing
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Consolidating Adjustments | Other
Reconciliation of Capital expenditures
Total capital expenditures	(33)	(9)	(73)	(17)
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	268	204	736	520
Machinery, Energy & Transportation | Business
Reconciliation of Capital expenditures
Total capital expenditures	291	195	845	574
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	268	204	736	520
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	63	26	101	71
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	30	17	70	40
Machinery, Energy & Transportation | Business | Timing
Reconciliation of Capital expenditures
Total capital expenditures	(5)	(21)	152	58
Machinery, Energy & Transportation | Business | Other
Reconciliation of Capital expenditures
Total capital expenditures	(65)	(31)	(214)	(115)
Financial Products | Business
Reconciliation of Capital expenditures
Total capital expenditures	343	327	1,357	1,080
Financial Products | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	298	308	1,192	1,018
Financial Products | Business | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Financial Products | Business | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Financial Products | Business | Timing
Reconciliation of Capital expenditures
Total capital expenditures	0	0	0	0
Financial Products | Business | Other
Reconciliation of Capital expenditures
Total capital expenditures	$ 45	$ 19	$ 165	$ 62