Employee Benefit Plans - Stock Options and Restricted Stock Units Under all Equity Plans (Except 2005 Director's Plan) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2014		Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted- Average Exercise Price per Share, Options Exercised	$ 24.47		$ 24.34		$ 21.09
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for Grant, Beginning Balance	8,472,000	[1]	7,352,000	[1]	5,911,000	[1]
Available for Grant, Options Granted	(1,686,000)	[1]	(1,704,000)	[1]	(1,719,000)	[1]
Available for Grant, Options Canceled/forfeited/expired	163,000	[1]	159,000	[1]	631,000	[1]
Available for Grant, Restricted stock units granted	(2,468,000)	[1],[2]	(2,519,000)	[1],[2]	(2,638,000)	[1],[2]
Available for Grant, Restricted stock units forfeited	174,000	[1],[2]	184,000	[1],[2]	167,000	[1],[2]
Available for Grant, Additional shares reserved	7,500,000	[1]	5,000,000	[1]	5,000,000	[1]
Available for Grants, Ending balance	12,155,000	[1]	8,472,000	[1]	7,352,000	[1]	5,911,000	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Options Granted	1,686,000		1,704,000		1,719,000
Options Outstanding, Options Assumed	843,000	[3]	158,000	[3]	382,000	[3]
Options Outstanding, Options Exercised	(2,103,000)		(4,173,000)		(7,103,000)
Options Outstanding, Options Canceled/forfeited/expired	(402,000)		(182,000)		(739,000)
Options Outstanding, Vested and expected to vest	7,677,000
Options Outstanding, Exercisable	3,844,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted- Average Exercise Price per Share, Beginning Balance	$ 26.87		$ 24.64		$ 22.76
Weighted- Average Exercise Price per Share, Options Granted	$ 38.65		$ 34.10		$ 28.86
Weighted- Average Exercise Price per Share, Options Assumed	$ 24.63	[3]	$ 23.60	[3]	$ 19.15	[3]
Weighted- Average Exercise Price per Share, Options Exercised	$ 24.47		$ 24.34		$ 21.09
Weighted- Average Exercise Price per Share, Options Canceled/forfeited/expired	$ 27.44		$ 24.17		$ 25.07
Weighted- Average Exercise Price per Share, Ending Balance	$ 29.81		$ 26.87		$ 24.64		$ 22.76
Weighted- Average Exercise Price per Share, Vested and expected to vest	$ 29.76
Weighted- Average Exercise Price per Share, Exercisable	$ 26.04
Weighted Average Remaining Contractual Life, options outstanding	4 years 7 months 28 days		4 years 3 months 18 days		3 years 8 months 16 days		2 years 11 months 19 days
Weighted-Average Remaining Contractual Life , Vested and expected to vest	4 years 7 months 24 days
Weighted-Average Remaining Contractual Life , Exercisable	3 years 6 months 11 days
Aggregate Intrinsic Value, Beginning Balance	$ 71,700		$ 80,950		$ 74,068
Aggregate Intrinsic Value, Ending Balance	86,537		71,700		80,950		74,068
Aggregate Intrinsic Value, Vested and expected to vest	86,126
Aggregate Intrinsic Value, Exercisable	$ 57,418
Stock Option | All Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Ending Balance	7,750,000		7,726,000		10,219,000		15,960,000

[1] Excluding shares reserved for future issuance under the 2005 Directors Plan.

[2] These amounts do not reflect the actual number of restricted stock units granted or forfeited but rather the effect on the total remaining shares available for future grants after the application of the share reserve ratio. For more information about the share reserve ratio, please see Restricted Stock Units above.

[3] The Company assumed options outstanding under various plans through acquisitions.