Financial Instruments, Summary of Derivative Instruments Gain (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Summary of Derivative Instruments Gains (Losses) [Abstract]
Net losses recorded in AOCL expected to be reclassified to net income in the future			$ 12
Foreign Currency Transaction Gain (Loss), before Tax	$ 5	$ 1	(1)	$ 0
Foreign Exchange Forward [Member] | Foreign Currency Gain (Loss) [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Summary of Derivative Instruments Gains (Losses) [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(50)	0	(35)	0
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Summary of Derivative Instruments Gains (Losses) [Abstract]
Derivative (loss) gain recognized in interest expense	(4)	5	0	2
Hedged item gain (loss) recognized in interest expense	4	(5)	0	(2)
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]
Summary of Derivative Instruments Gains (Losses) [Abstract]
Derivative (loss) gain recognized in OCI (effective portion)	(24)	11	7	29
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member] | Cost of Sales [Member]
Summary of Derivative Instruments Gains (Losses) [Abstract]
Derivative loss reclassified from AOCI to income - Cost of sales (effective portion)	$ 0	$ (8)	$ (10)	$ (29)