Financial Instruments (Schedule Of Effect Of Derivatives Recognized) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Schedule of Cost-method Investments [Line Items]
Long-term Debt, Current Maturities	$ 88		$ 88		$ 89
Derivatives not designated as hedging instruments	23	(15)	(7)	28
Interest Rate Swaps [Member]
Schedule of Cost-method Investments [Line Items]
Derivative, Notional Amount	1,874		1,874
Foreign Exchange Contracts [Member]
Schedule of Cost-method Investments [Line Items]
Derivative, Notional Amount	104		104
Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]
Schedule of Cost-method Investments [Line Items]
Interest rate swaps	3	0	1	1
Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	22	(13)	0	5
Not Designated As Hedging Instruments [Member] | Commodity Contracts [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	(2)	0	(7)	22
Not Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	0	(2)	(1)	0
Operating Expense [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	3	3		9
Foreign Exchange Contract [Member]
Schedule of Cost-method Investments [Line Items]
Derivatives not designated as hedging instruments	$ 19	$ 16	$ 7	$ 13