Derivatives (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Effective Portion Reclassified from AOCI to Earnings	$ 9	$ 24	$ 52	$ 45
Derivative Instruments, Effective Portion Recognized in Other Comprehensive Income	(39)	69	(88)	162
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Effective Portion Reclassified from AOCI to Earnings	(19)	0	(19)	0
Derivative Instruments, Effective Portion Recognized in Other Comprehensive Income	21	15	23	21
Foreign Currency Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Effective Portion Reclassified from AOCI to Earnings	28	24	71	45
Derivative Instruments, Effective Portion Recognized in Other Comprehensive Income	$ (60)	$ 54	$ (111)	$ 141