Derivatives (Pretax Effect Of Derivative Instruments Designated As Accounting Hedges Of Fair Value) (Detail) (Net Interest And Other Financial Income Costs [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Member] | Interest Rate Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	$ 0	$ 1	$ 19
Hedged Item [Member] | Long-term Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss)	$ 0	$ (1)	$ (19)