Financial Instruments (Schedule Of Effect Of Derivatives Recognized) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Schedule of Cost-method Investments [Line Items]
Long-term Debt, Current Maturities	$ 32		$ 32		$ 28
Derivatives not designated as hedging instruments	(15)	$ (13)	17	$ (30)
Interest Rate Swaps [Member]
Schedule of Cost-method Investments [Line Items]
Derivative, Notional Amount	1,837		1,837
Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Schedule of Cost-method Investments [Line Items]
Interest rate swaps	0	(3)	(3)	(2)
Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	(19)	(11)	16	(29)
Not Designated As Hedging Instruments [Member] | Commodity Contracts [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	4	1	4	1
Operating Expense [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments			14	3
Foreign Exchange Contract [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	$ 19	$ 11	$ 2	$ 26