Commitments and Contingencies - Additional Information (Detail) ft² in Thousands		3 Months Ended	12 Months Ended
	Jun. 29, 2018 USD ($)	Jul. 31, 2018 USD ($)	Oct. 31, 2019 USD ($) ft² Building	Oct. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Rent expenses			$ 91,300,000	$ 75,700,000	$ 68,100,000
Number of buildings to be leased | Building			2
Total square feet of buildings | ft²			341
Lease renewal term, in years			10 years
Additional renewal term, in years			9 years
Payments for legal settlements	$ 65,000,000.0
Release of loss contingency accrual		$ 39,000,000.0
Litigation settlement, expense		$ 26,000,000.0
Patent cross-license			7 years
Minimum
Loss Contingencies [Line Items]
Potential one-time termination charge			$ 0.0
Maximum
Loss Contingencies [Line Items]
Potential one-time termination charge			$ 25,000,000.0