Liabilities and Restructuring Charges - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Oct. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8,751	$ (35)
Employee Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6,100	6,800
Employee related restructuring liabilities	25,300	$ 1,300	$ 22,600
Involuntary Employee Termination And VRP
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8,800
Minimum | Employee Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	56,000
Maximum | Employee Severance and Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	$ 65,000