Derivative Financial Instruments and Risk Management (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives	$ 7	$ 70	$ 4	$ 58
Gains (Losses) on Borrowings	(3)	(77)	7	(64)
Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	(12)	58	(56)	39
Amount of Gains (Losses) Reclassified from AOCI (Effective Portion)	(14)	39	(16)	35
Recognized in Earnings (Ineffective Portion)	0	(2)	(1)	(1)
Interest rate contracts, Gains or (Losses) on derivatives not designated as hedging instruments		0		(149)
Gains or (Losses) on derivatives not designated as hedging instruments	(1)	(34)	31	(136)
Machinery and Power Systems
Derivative Instruments, Gain (Loss)
Foreign exchange contracts, Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	(6)	62	(48)	44
Interest rate contracts, Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	0	0	0	0
Financial Products
Derivative Instruments, Gain (Loss)
Interest rate contracts, Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	(6)	(4)	(8)	(5)
Other Income (Expense) | Machinery and Power Systems
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives		0		(1)
Gains (Losses) on Borrowings		0		1
Foreign exchange contracts, Amount of Gains (Losses) Reclassified from AOCI (Effective Portion)	(14)	43	(13)	52
Foreign exchange contracts, Recognized in Earnings (Ineffective Portion)	0	0	0	0
Interest rate contracts, Amount of Gains (Losses) Reclassified from AOCI (Effective Portion)	1	(1)	0	(2)
Interest rate contracts, Recognized in Earnings (Ineffective Portion)	0	0	0	0
Foreign exchange contracts, Gains or (Losses) on derivatives not designated as hedging instruments	(9)	(1)	21	46
Interest rate contracts, Gains or (Losses) on derivatives not designated as hedging instruments		0		(149)
Commodity contracts, Gains or (Losses) on derivatives not designated as hedging instruments	3	(23)	3	(21)
Other Income (Expense) | Financial Products
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives	7	70	4	59
Gains (Losses) on Borrowings	(3)	(77)	7	(65)
Foreign exchange contracts, Gains or (Losses) on derivatives not designated as hedging instruments	5	(10)	7	(12)
Interest Expense | Financial Products
Derivative Instruments, Gain (Loss)
Interest rate contracts, Amount of Gains (Losses) Reclassified from AOCI (Effective Portion)	(1)	(3)	(3)	(15)
Interest rate contracts, Recognized in Earnings (Ineffective Portion)	$ 0	$ (2)	$ (1)	$ (1)