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Basis Of Presentation And Recently Issued Accounting Pronouncements (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Basis Of Presentation And Recently Issued Accounting Pronouncements [Abstract] |  |  |  |
Net unrealized gain or loss on foreign-currency transactions of intercompany loan hedges | $ (1) | $ (1) | $ (8) | $ (10)

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- Definition Net unrealized gain or loss on foreign-currency transactions of intercompany loan hedges. + References No definition available. + Details
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