Segment Information (Details 8) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of Capital expenditures
Total capital expenditures	$ 771	$ 615	$ 1,528	$ 1,124
Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	774	597	1,362	1,026
All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	27	25	38	45
Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	26	14	40	23
Timing
Reconciliation of Capital expenditures
Total capital expenditures	(18)	(9)	157	79
Other
Reconciliation of Capital expenditures
Total capital expenditures	(38)	(12)	(69)	(49)
Consolidating Adjustments
Reconciliation of Capital expenditures
Total capital expenditures	(36)	(5)	(40)	(8)
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	(36)	(5)	(40)	(8)
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	241	158	468	316
Machinery, Energy & Transportation | Business
Reconciliation of Capital expenditures
Total capital expenditures	231	170	554	379
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	241	158	468	316
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	27	25	38	45
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	26	14	40	23
Machinery, Energy & Transportation | Business | Timing
Reconciliation of Capital expenditures
Total capital expenditures	(18)	(9)	157	79
Machinery, Energy & Transportation | Business | Other
Reconciliation of Capital expenditures
Total capital expenditures	(45)	(18)	(149)	(84)
Financial Products | Business
Reconciliation of Capital expenditures
Total capital expenditures	576	450	1,014	753
Financial Products | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	533	439	894	710
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	$ 43	$ 11	$ 120	$ 43