Basis Of Presentation And Recently Issued Accounting Pronouncements (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basis Of Presentation And Recently Issued Accounting Pronouncements [Abstract]
Net unrealized gain or loss on foreign-currency transactions of intercompany loan hedges	$ (6)	$ (2)	$ (10)	$ (4)