Derivative Financial Instruments and Risk Management (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Designated Derivatives | Fair Value Hedges
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives	$ (19)	$ (9)	$ (38)	$ (87)
Gains (Losses) on Borrowings	1	12	24	92
Designated Derivatives | Fair Value Hedges | Interest rate contracts | Financial Products | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives	(19)	(9)	(38)	(87)
Gains (Losses) on Borrowings	1	12	24	92
Designated Derivatives | Fair Value Hedges | Interest rate contracts | Financial Products | Other Income (Expense) | Correction to prior periods
Derivative Instruments, Gain (Loss)
Gains (Losses) on Borrowings	(18)		(14)
Designated Derivatives | Cash Flow Hedges
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	(47)	41	(90)	4
Amount of Gains (Losses) Reclassified from AOCI to Earnings	1	(14)	17	(66)
Recognized in Earnings (Ineffective Portion)	0	0	0	0
Designated Derivatives | Cash Flow Hedges | Foreign exchange contracts | Machinery, Energy & Transportation
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	(45)	44	(20)	4
Designated Derivatives | Cash Flow Hedges | Foreign exchange contracts | Machinery, Energy & Transportation | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings	4	(12)	24	(60)
Recognized in Earnings (Ineffective Portion)	0	0	0	0
Gains (Losses) reclassified from AOCI to earnings for derivatives dedesignated as related transactions are no longer probable to occur				(3)
Designated Derivatives | Cash Flow Hedges | Interest rate contracts | Machinery, Energy & Transportation
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	0	0	(63)	0
Designated Derivatives | Cash Flow Hedges | Interest rate contracts | Machinery, Energy & Transportation | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings		(1)		(2)
Recognized in Earnings (Ineffective Portion)		0		0
Designated Derivatives | Cash Flow Hedges | Interest rate contracts | Machinery, Energy & Transportation | Interest Expense
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings	(1)		(3)
Recognized in Earnings (Ineffective Portion)	0		0
Designated Derivatives | Cash Flow Hedges | Interest rate contracts | Financial Products
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI (Effective Portion)	(2)	(3)	(7)	0
Designated Derivatives | Cash Flow Hedges | Interest rate contracts | Financial Products | Interest Expense
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings	(2)	(1)	(4)	(4)
Recognized in Earnings (Ineffective Portion)	0	0	0	0
Undesignated Derivatives
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(69)	19	(74)	8
Undesignated Derivatives | Foreign exchange contracts | Machinery, Energy & Transportation | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(44)	15	(35)	7
Undesignated Derivatives | Foreign exchange contracts | Financial Products | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(19)	3	(36)	4
Undesignated Derivatives | Interest rate contracts | Financial Products | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	0	(1)	0	(1)
Undesignated Derivatives | Commodity contracts | Machinery, Energy & Transportation | Other Income (Expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ (6)	$ 2	$ (3)	$ (2)