Summary of Reconciliation of Beginning and Ending Balance of Gross Unrecognized Tax Benefit (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Reconciliation of Unrecognized Tax Benefits [Line Items]
Beginning balance	$ 177,893	$ 213,923
Increases in unrecognized tax benefits related to prior year tax positions	6,053	4,188
Decreases in unrecognized tax benefits related to prior year tax positions	(35,010)	(44,061)
Increases in unrecognized tax benefits related to current year tax positions	9,431	19,922
Decreases in unrecognized tax benefits related to settlements with taxing authorities	(80,137)	(1,258)
Reductions in unrecognized tax benefits due to lapse of applicable statute of limitations	(3,499)	(15,200)
Increases in unrecognized tax benefits acquired	35,171	350
Changes in unrecognized tax benefits due to foreign currency translation	(222)	29
Ending Balance	$ 109,680	$ 177,893