Other Balance Sheet Details (Details 2) (USD $)	3 Months Ended	9 Months Ended
	Jan. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 54,372,000	$ 47,282,000	$ 54,372,000
Provisions		23,495,000	10,538,000
Settlements		(19,144,000)	(19,205,000)
Balance at end of period		51,633,000	45,705,000
Reduction in warranty liability	$ (6,900,000)