Employee Benefit Plans - Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Director's Plan) (Detail) - 2006 Employee Equity Incentive Plan shares in Thousands	12 Months Ended
	Oct. 31, 2023 shares	Oct. 31, 2022 shares	Oct. 31, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Available for grant, beginning balance (in shares)	13,111	13,751	12,129
Available for Grant, Additional shares reserved (in shares)	3,300	3,000	4,700
Available for grants, ending balance (in shares)	13,286	13,111	13,751
Share reserve ratio	1.70
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Available for Grant, Options granted (in shares)	(294)	(286)	(353)
Available for Grant, Options canceled/forfeited/expired (in shares)	89	114	36
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Available for Grant, Restricted stock units granted (in shares)	(3,540)	(4,083)	(3,232)
Available for Grant, Restricted stock units forfeited (in shares)	620	615	471