Financial Instruments, Summary of Derivative Instruments Gain (Losses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of Derivative Instruments Gains (Losses) [Abstract]
Net losses recorded in AOCL expected to be reclassified to net income in the future			$ 3
Foreign Currency Transaction Gain (Loss), before Tax	$ 3	$ 0	4	$ 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	33	1	(2)	1
Fair Value Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Summary of Derivative Instruments Gains (Losses) [Abstract]
Derivative gain (loss) recognized in interest expense	7	(2)	7	0
Hedged item (loss) gain recognized in interest expense	(7)	2	(7)	0
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]
Summary of Derivative Instruments Gains (Losses) [Abstract]
Derivative gain (loss) recognized in OCI (effective portion)	5	(19)	12	10
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)	$ (11)	$ (3)	$ (21)	$ (32)