Taxes on Earnings (Detail 8) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Carryforward
U.S. foreign tax credits	$ 2,623
U.S. research and development and other credits	110
Tax credits in state and foreign jurisdictions	166
Balance at end of year	2,899
Valuation Allowance
Tax credits in state and foreign jurisdictions	(162)
Balance at end of year	(162)
Valuation allowance balance
Balance at beginning of year	2,095
Income tax expense	164	$ (623)	$ 705
Balance at end of year	2,789	2,095
Increase (decrease) in valuation allowances	694	(523)
Deferred tax asset valuation allowance
Valuation allowance balance
Balance at beginning of year	2,095	1,572	1,527
Income tax expense	848	(203)	(1,449)
Other comprehensive income, currency translation and charges to other accounts	(154)	726	1,494
Balance at end of year	$ 2,789	$ 2,095	$ 1,572