Segment Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Reconciliation of Sales and revenues
Sales and revenues	$ 13,241	$ 13,210
Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	12,780	12,772
All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	554	517
Other
Reconciliation of Sales and revenues
Sales and revenues	(93)	(79)
Consolidating Adjustments
Reconciliation of Sales and revenues
Sales and revenues	(83)	(88)
Consolidating Adjustments | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	0	0
Consolidating Adjustments | All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	0	0
Consolidating Adjustments | Other
Reconciliation of Sales and revenues
Sales and revenues	(83)	(88)
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	11,963	11,977
Machinery, Energy & Transportation | Business
Reconciliation of Sales and revenues
Sales and revenues	12,493	12,484
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	11,963	11,977
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	554	517
Machinery, Energy & Transportation | Business | Other
Reconciliation of Sales and revenues
Sales and revenues	(24)	(10)
Financial Products | Business
Reconciliation of Sales and revenues
Sales and revenues	831	814
Financial Products | Business | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	817	795
Financial Products | Business | All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	0	0
Financial Products | Business | Other
Reconciliation of Sales and revenues
Sales and revenues	$ 14	$ 19