Financial Instruments-Contractual Maturities (Detail) - USD ($) $ in Millions	Apr. 30, 2016	Oct. 31, 2015
Cost
Due in one year	$ 2
Due in more than five years	37
Fair Value
Due in one year	2
Due in more than five years	47
Carrying value of equity securities in privately-held companies	$ 12	$ 13