Segment Information (Details 4) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Reconciliation of Assets
Total assets	$ 87,272	$ 89,356
Reportable Segments
Reconciliation of Assets
Total assets	66,444	69,734
All Other operating segment
Reconciliation of Assets
Total assets	1,442	1,499
Cash and Short Term Investments
Reconciliation of Assets
Total assets	4,108	3,306
Intercompany Receivables
Reconciliation of Assets
Total assets	0	0
Investment in Financial Products
Reconciliation of Assets
Total assets	0	0
Deferred Income Taxes
Reconciliation of Assets
Total assets	3,393	3,410
Goodwill and Intangible Assets
Reconciliation of Assets
Total assets	3,567	3,145
Property Plant and Equipment-Net and Other Assets
Reconciliation of Assets
Total assets	1,057	668
Operating Lease Methodology Difference
Reconciliation of Assets
Total assets	(287)	(329)
Liabilities Included in Segment Assets
Reconciliation of Assets
Total assets	10,504	11,293
Inventory Methodology Differences
Reconciliation of Assets
Total assets	(2,610)	(2,949)
Other
Reconciliation of Assets
Total assets	(346)	(421)
Consolidating Adjustments
Reconciliation of Assets
Total assets	(5,565)	(5,384)
Consolidating Adjustments | Reportable Segments
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | All Other operating segment
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Cash and Short Term Investments
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Intercompany Receivables
Reconciliation of Assets
Total assets	(243)	(303)
Consolidating Adjustments | Investment in Financial Products
Reconciliation of Assets
Total assets	(4,769)	(4,433)
Consolidating Adjustments | Deferred Income Taxes
Reconciliation of Assets
Total assets	(490)	(516)
Consolidating Adjustments | Goodwill and Intangible Assets
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Property Plant and Equipment-Net and Other Assets
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Operating Lease Methodology Difference
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Liabilities Included in Segment Assets
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Inventory Methodology Differences
Reconciliation of Assets
Total assets	0	0
Consolidating Adjustments | Other
Reconciliation of Assets
Total assets	(63)	(132)
Machinery and Power Systems | Reportable Segments
Reconciliation of Assets
Total assets	29,205	33,171
Machinery and Power Systems | Business
Reconciliation of Assets
Total assets	55,749	58,284
Machinery and Power Systems | Business | Reportable Segments
Reconciliation of Assets
Total assets	29,205	33,171
Machinery and Power Systems | Business | All Other operating segment
Reconciliation of Assets
Total assets	1,442	1,499
Machinery and Power Systems | Business | Cash and Short Term Investments
Reconciliation of Assets
Total assets	4,108	3,306
Machinery and Power Systems | Business | Intercompany Receivables
Reconciliation of Assets
Total assets	243	303
Machinery and Power Systems | Business | Investment in Financial Products
Reconciliation of Assets
Total assets	4,769	4,433
Machinery and Power Systems | Business | Deferred Income Taxes
Reconciliation of Assets
Total assets	3,883	3,926
Machinery and Power Systems | Business | Goodwill and Intangible Assets
Reconciliation of Assets
Total assets	3,567	3,145
Machinery and Power Systems | Business | Property Plant and Equipment-Net and Other Assets
Reconciliation of Assets
Total assets	1,057	668
Machinery and Power Systems | Business | Operating Lease Methodology Difference
Reconciliation of Assets
Total assets	(287)	(329)
Machinery and Power Systems | Business | Liabilities Included in Segment Assets
Reconciliation of Assets
Total assets	10,504	11,293
Machinery and Power Systems | Business | Inventory Methodology Differences
Reconciliation of Assets
Total assets	(2,610)	(2,949)
Machinery and Power Systems | Business | Other
Reconciliation of Assets
Total assets	(132)	(182)
Financial Products | Business
Reconciliation of Assets
Total assets	37,088	36,456
Financial Products | Business | Reportable Segments
Reconciliation of Assets
Total assets	37,239	36,563
Financial Products | Business | All Other operating segment
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Cash and Short Term Investments
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Intercompany Receivables
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Investment in Financial Products
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Deferred Income Taxes
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Goodwill and Intangible Assets
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Property Plant and Equipment-Net and Other Assets
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Operating Lease Methodology Difference
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Liabilities Included in Segment Assets
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Inventory Methodology Differences
Reconciliation of Assets
Total assets	0	0
Financial Products | Business | Other
Reconciliation of Assets
Total assets	$ (151)	$ (107)