Derivative Financial Instruments and Risk Management (Details 5) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Designated derivatives | Fair value hedges | Interest rate contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives	$ (6)	$ (49)	$ (19)	$ (78)
Gains (Losses) on Borrowings	8	50	23	80
Designated derivatives | Cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings (Effective Portion)	(1)	(2)	(2)	(3)
Recognized in Earnings (Ineffective Portion)	0	0	0	0
Designated derivatives | Cash flow hedges | Interest rate contracts | Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings (Effective Portion)	(1)	(2)	(2)	(3)
Recognized in Earnings (Ineffective Portion)	0	0	0	0
Designated derivatives | Cash flow hedges | Interest rate contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI to Earnings (Effective Portion)	0	0	0	0
Recognized in Earnings (Ineffective Portion)	0	0	0	0
Undesignated derivatives
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(12)	16	(17)	1
Undesignated derivatives | Foreign exchange contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(9)	5	(10)	(6)
Undesignated derivatives | Cross currency contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ (3)	$ 11	$ (7)	$ 7