Derivative Financial Instruments and Risk Management (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Designated Derivatives
Derivatives Fair Value
Asset (Liability) Fair Value	$ 205	$ 232
Designated Derivatives | Foreign exchange contracts | Receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	32	54
Designated Derivatives | Foreign exchange contracts | Long-term receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	3	19
Designated Derivatives | Foreign exchange contracts | Accrued Liabilities | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	(60)	(73)
Designated Derivatives | Foreign exchange contracts | Other Liabilities | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	(7)	(10)
Designated Derivatives | Interest Rate Contract | Receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	15	15
Designated Derivatives | Interest Rate Contract | Long-term receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	229	233
Designated Derivatives | Interest Rate Contract | Accrued Liabilities | Financial Products
Derivatives Fair Value
Liability Fair Value	(7)	(6)
Undesignated Derivatives
Derivatives Fair Value
Asset (Liability) Fair Value	(60)	(87)
Undesignated Derivatives | Foreign exchange contracts | Receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	8	27
Undesignated Derivatives | Foreign exchange contracts | Receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	11	7
Undesignated Derivatives | Foreign exchange contracts | Accrued Liabilities | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	(35)	(12)
Undesignated Derivatives | Foreign exchange contracts | Accrued Liabilities | Financial Products
Derivatives Fair Value
Liability Fair Value	(11)	(16)
Undesignated Derivatives | Foreign exchange contracts | Other Liabilities | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	(28)	(85)
Undesignated Derivatives | Interest Rate Contract | Accrued Liabilities | Financial Products
Derivatives Fair Value
Liability Fair Value	(2)	(1)
Undesignated Derivatives | Commodity Contract | Receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	1	2
Undesignated Derivatives | Commodity Contract | Accrued Liabilities | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	$ (4)	$ (9)