Taxes on Earnings (Detail 3) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Income Tax Disclosure [Abstract]
Income tax benefits related to items unique to the year	$ (249)	$ 1,600	$ 113
Income tax charges related to tax indemnification	714
Settlement of pre-separation liabilities	647
Income tax charges related to gain on sale of business	169
Income tax benefits related to acquisition, separation, divestiture	270
Income tax benefits on restructuring	212
Income tax benefits on sale	124
Income tax benefits related to valuation allowances		1,800
Income tax benefits related to restructuring and separation related costs		447
Income tax benefits for adjustments to uncertain tax positions		131
Tax charges to record valuation allowances on certain foreign deferred tax assets		486
Income tax charges related to state tax impacts		217
Tax benefit associated with miscellaneous prior period adjustments			66
Tax benefit recorded for increases to foreign and state valuation allowances			35
Income tax benefits, reduced rates for subsidiaries in certain countries	$ 401	$ 260	$ 546
Income tax benefits, reduced rates for subsidiaries in certain countries (in dollars per share)	$ 0.23	$ 0.14	$ 0.30