Fair Value Measurements (Assets Measured At Fair Value On Nonrecurring Basis) (Detail) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, plant and equipment, net, Fair Value	$ 1	$ 0	$ 0
Property, plant and equipment, net, Impairment	8	0	0
Other noncurrent assets, Fair Value	0	0	0
Other noncurrent assets, Impairment	$ 0	$ 14	$ 0