Segment Information (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Reconciliation of Sales and revenues
Sales and revenues	$ 11,331	$ 10,342	$ 21,153	$ 19,803
Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	11,406	10,392	21,283	19,905
All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	33	41	70	79
Other
Reconciliation of Sales and revenues
Sales and revenues	(108)	(91)	(200)	(181)
Consolidating Adjustments
Reconciliation of Sales and revenues
Sales and revenues	(101)	(81)	(186)	(159)
Consolidating Adjustments | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	0	0	0	0
Consolidating Adjustments | All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	0	0	0	0
Consolidating Adjustments | Other
Reconciliation of Sales and revenues
Sales and revenues	(101)	(81)	(186)	(159)
Machinery, Energy & Transportation | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	10,630	9,633	19,747	18,403
Machinery, Energy & Transportation | Business
Reconciliation of Sales and revenues
Sales and revenues	10,639	9,645	19,769	18,425
Machinery, Energy & Transportation | Business | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	10,630	9,633	19,747	18,403
Machinery, Energy & Transportation | Business | All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	33	41	70	79
Machinery, Energy & Transportation | Business | Other
Reconciliation of Sales and revenues
Sales and revenues	(24)	(29)	(48)	(57)
Financial Products | Business
Reconciliation of Sales and revenues
Sales and revenues	793	778	1,570	1,537
Financial Products | Business | Reportable Segments
Reconciliation of Sales and revenues
Sales and revenues	776	759	1,536	1,502
Financial Products | Business | All Other operating segments
Reconciliation of Sales and revenues
Sales and revenues	0	0	0	0
Financial Products | Business | Other
Reconciliation of Sales and revenues
Sales and revenues	$ 17	$ 19	$ 34	$ 35