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Fair Value Measurements (Tables)
 6 Months Ended
Apr. 30, 2025
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis
Assets and liabilities measured at fair value on a recurring basis are summarized below as of April 30, 2025:
  Fair Value Measurement Using
DescriptionTotalQuoted Prices in 
Active Markets
for Identical Assets
(Level 1)		Significant Other
Observable Inputs
(Level 2)		Significant
Unobservable
 Inputs
(Level 3)
 (in thousands)
Assets
Cash equivalents:
Money market funds$630,455 630,455 $— $— 
Short-term investments:
U.S. Treasury, agency & T-bills15,039 — 15,039 — 
Corporate debt securities102,905 — 102,905 — 
Asset-backed securities26,872 — 26,872 — 
Prepaid and other current assets:
Foreign currency derivative contracts9,140 — 9,140 — 
Contingent consideration receivable22,202 — — 22,202 
Other long-term assets:
Deferred compensation plan assets388,851 388,851 — — 
Total assets$1,195,464 $1,019,306 $153,956 $22,202 
Liabilities
Accounts payable and accrued liabilities:
Foreign currency derivative contracts$6,181 $— $6,181 $— 
Other long-term liabilities:
Deferred compensation plan liabilities388,851 388,851 — — 
Total liabilities$395,032 $388,851 $6,181 $— 
Assets and liabilities measured at fair value on a recurring basis are summarized below as of October 31, 2024:
  Fair Value Measurement Using
DescriptionTotalQuoted Prices in 
Active Markets
for Identical Assets
(Level 1)		Significant Other
Observable Inputs
(Level 2)		Significant
Unobservable 
Inputs
(Level 3)
 (in thousands)
Assets
Cash equivalents:
Money market funds$869,972 $869,972 $— $— 
U.S. Treasury, agency & T-bills7,985 — 7,985 — 
Short-term investments:
U.S. Treasury, agency & T-bills19,449 — 19,449 — 
Corporate debt securities105,256 — 105,256 — 
Asset-backed securities29,164 — 29,164 — 
Prepaid and other current assets:
Foreign currency derivative contracts8,851 — 8,851 — 
Contingent consideration receivable22,202 — — 22,202 
Other long-term assets:
Deferred compensation plan assets386,757 386,757 — — 
Total assets$1,449,636 $1,256,729 $170,705 $22,202 
Liabilities
Accounts payable and accrued liabilities:
Foreign currency derivative contracts$7,032 $— $7,032 $— 
Other long-term liabilities:
Deferred compensation plan liabilities386,757 386,757 — — 
Total liabilities$393,789 $386,757 $7,032 $—