Segment Information (Details 7) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Reconciliation of Capital expenditures
Total capital expenditures	$ 826	$ 739
Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	509	433
All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	46	38
Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	19	21
Timing
Reconciliation of Capital expenditures
Total capital expenditures	253	267
Other
Reconciliation of Capital expenditures
Total capital expenditures	(1)	(20)
Consolidating Adjustments
Reconciliation of Capital expenditures
Total capital expenditures	(8)	(23)
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	(8)	(23)
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	215	164
Machinery, Energy & Transportation | Business
Reconciliation of Capital expenditures
Total capital expenditures	477	469
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	215	164
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Capital expenditures
Total capital expenditures	46	38
Machinery, Energy & Transportation | Business | Cost Centers
Reconciliation of Capital expenditures
Total capital expenditures	19	21
Machinery, Energy & Transportation | Business | Timing
Reconciliation of Capital expenditures
Total capital expenditures	253	267
Machinery, Energy & Transportation | Business | Other
Reconciliation of Capital expenditures
Total capital expenditures	(56)	(21)
Financial Products | Business
Reconciliation of Capital expenditures
Total capital expenditures	357	293
Financial Products | Business | Reportable Segments
Reconciliation of Capital expenditures
Total capital expenditures	294	269
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	$ 63	$ 24