Business Combinations - Additional Information (Details) - USD ($)		3 Months Ended				9 Months Ended
	Jun. 22, 2022	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Oct. 31, 2021
Business Acquisition [Line Items]
Goodwill		$ 3,854,889,000				$ 3,854,889,000		$ 3,575,785,000
Redeemable non-controlling interest		43,516,000				43,516,000		$ 0
Transaction costs		5,200,000			$ 5,700,000	11,300,000	$ 11,600,000
NTT Security AppSec Solutions Inc
Business Acquisition [Line Items]
Cash paid	$ 330,112,000
Goodwill	247,734,000
Goodwill, expected tax deductible amount	0
Intangible assets	97,500,000
Consideration transfered	$ 307,263,000
NTT Security AppSec Solutions Inc | Minimum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	5 years
NTT Security AppSec Solutions Inc | Maximum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	10 years
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Goodwill				$ 15,700,000
Goodwill, expected tax deductible amount				0
Intangible assets				4,300,000
Consideration transfered				$ 20,000,000
OpenLight
Business Acquisition [Line Items]
Goodwill			$ 45,100,000
Goodwill, expected tax deductible amount			0
Intangible assets			94,000,000
Consideration transfered			$ 90,000,000
Percentage of equity interests acquired			75.00%
Percentage of equity interests held by non-controlling interest			25.00%
Redeemable noncontrolling interest, redemption value			$ 30,000,000
Redeemable noncontrolling interest, put option value			10,100,000
Consideration transferred including redeemable noncontrolling interest			$ 100,100,000
Net income (loss) incurred by OpenLight		12,900,000
Net income (loss), attributable to redeemable non-controlling interest		3,200,000
Redeemable non-controlling interest		$ 43,500,000				$ 43,500,000