Financial Instruments (Detail 2) - USD ($) $ in Millions	Jan. 31, 2016	Oct. 31, 2015
Cost
Due in one to five years	$ 1
Due in more than five years	34
Total	35
Fair Value
Due in one to five years	1
Due in more than five years	44
Total	45
Investment Holdings
Investment amount	50	$ 49
Equity securities in privately held companies | Other Non-Current Assets
Investment Holdings
Investment amount	$ 14	$ 13