Employee Benefit Plans - Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Director's Plan) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted- Average Exercise Price per Share, Options exercised (in USD per share)	$ 34.56	$ 30.06	$ 26.06
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant, beginning balance (in shares)	11,244	11,883	12,155
Available for Grant, Options granted (in shares)	(1,505)	(1,685)	(1,908)
Available for Grant, Options canceled/forfeited/expired (in shares)	129	33	230
Available for Grant, Restricted stock units granted (in shares)	(2,694)	(2,967)	(2,707)
Available for Grant, Restricted stock units forfeited (in shares)	409	180	313
Available for Grant, Additional shares reserved (in shares)	5,000	3,800	3,800
Available for grants, ending balance (in shares)	12,583	11,244	11,883	12,155
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Options granted (in shares)	1,536	1,685	1,942
Options Outstanding, Options assumed (in shares)	154		133
Options Outstanding, Options exercised (in shares)	(1,770)	(2,154)	(2,125)
Options Outstanding, Options canceled/forfeited/expired (in shares)	(145)	(65)	(411)
Options Outstanding, Vested and expected to vest (in shares)	6,530
Options Outstanding, Exercisable (in shares)	3,252
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted- Average Exercise Price per Share, Beginning balance (in USD per share)	$ 39.59	$ 34.94	$ 29.81
Weighted- Average Exercise Price per Share, Options granted (in USD per share)	68.18	47.39	45.14
Weighted- Average Exercise Price per Share, Options assumed (in USD per share)	34.52		38.97
Weighted- Average Exercise Price per Share, Options exercised (in USD per share)	34.56	30.06	26.06
Weighted- Average Exercise Price per Share, Options canceled/forfeited/expired (in USD per share)	47.17	35.31	33.51
Weighted- Average Exercise Price per Share, Ending balance (in USD per share)	46.83	$ 39.59	$ 34.94	$ 29.81
Weighted- Average Exercise Price per Share, Vested and expected to vest (in USD per share)	46.83
Weighted- Average Exercise Price per Share, Exercisable (in USD per share)	$ 39.72
Weighted Average Remaining Contractual Life, options outstanding	4 years 7 months 6 days	4 years 7 months 24 days	4 years 8 months 1 day	4 years 7 months 28 days
Weighted-Average Remaining Contractual Life , Vested and expected to vest	4 years 7 months 6 days
Weighted-Average Remaining Contractual Life , Exercisable	3 years 7 months 21 days
Aggregate Intrinsic Value, Beginning balance	$ 126,850	$ 109,627	$ 86,537
Aggregate Intrinsic Value, ending Balance	263,555	$ 126,850	$ 109,627	$ 86,537
Aggregate Intrinsic Value, Vested and expected to vest	263,555
Aggregate Intrinsic Value, Exercisable	$ 154,357
Stock Option | All Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning balance (in shares)	6,755	7,289	7,750
Options outstanding, ending balance (in shares)	6,530	6,755	7,289	7,750