Taxes on Earnings - Additional Information (Detail) $ in Millions	3 Months Ended
	Jan. 31, 2017 USD ($) Country	Jan. 31, 2016 USD ($)	Oct. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Effective tax rate	33.90%	16.00%
U.S. federal statutory income tax rate	35.00%
Net income tax benefits related to unique items	$ 75	$ 36
Tax benefits related to restructuring and separation costs	73	31
Income tax benefits related to other items	$ 2	$ 5
Number of countries other than United States where entity is subject to income tax | Country	105
Unrecognized tax benefits	$ 348		$ 344
Unrecognized tax benefits that would affect effective tax rate if realized	226		224
Accrued interest and penalties	$ 62		$ 62
Likelihood of unfavorable settlement description	Parent does not expect complete resolution of any U.S. Internal Revenue Service audit cycle within the next 12 months. However, it is reasonably possible that certain federal, foreign and state tax issues may be concluded in the next 12 months, including issues involving resolution of certain intercompany transactions, joint and several tax liabilities and other matters.
Reasonably possible reduction in existing unrecognized tax benefits within the next 12 months	$ 19