Derivative Financial Instruments and Risk Management (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Derivatives Fair Value
Asset Fair Value	$ 294	$ 298
Liability Fair Value	(217)	(144)
Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	86	60
Liability Fair Value	(188)	(129)
Financial Products
Derivatives Fair Value
Asset Fair Value	208	238
Liability Fair Value	(29)	(15)
Designated Derivatives
Derivatives Fair Value
Asset (Liability) Fair Value	120	180
Designated Derivatives | Foreign exchange contracts | Receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	19	28
Designated Derivatives | Foreign exchange contracts | Accrued Expenses | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	(89)	(66)
Designated Derivatives | Interest rate contracts | Receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	14	17
Designated Derivatives | Interest rate contracts | Long-term receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	184	209
Designated Derivatives | Interest rate contracts | Accrued Expenses | Financial Products
Derivatives Fair Value
Liability Fair Value	(8)	(8)
Undesignated Derivatives
Derivatives Fair Value
Asset (Liability) Fair Value	(43)	(26)
Undesignated Derivatives | Foreign exchange contracts | Receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	67	31
Undesignated Derivatives | Foreign exchange contracts | Receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	9	10
Undesignated Derivatives | Foreign exchange contracts | Accrued Expenses | Machinery and Power Systems
Derivatives Fair Value
Liability Fair Value	(99)	(63)
Undesignated Derivatives | Foreign exchange contracts | Accrued Expenses | Financial Products
Derivatives Fair Value
Liability Fair Value	(20)	(6)
Undesignated Derivatives | Interest rate contracts | Receivables-trade and other | Financial Products
Derivatives Fair Value
Asset Fair Value	1	2
Undesignated Derivatives | Interest rate contracts | Accrued Expenses | Financial Products
Derivatives Fair Value
Liability Fair Value	(1)	(1)
Undesignated Derivatives | Commodity contracts | Receivables-trade and other | Machinery and Power Systems
Derivatives Fair Value
Asset Fair Value	$ 0	$ 1