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Employee Benefit Plans (Tables)
 12 Months Ended
Oct. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Restricted Stock Units The following table contains information concerning activities related to restricted stock units granted under the 2006 Employee Plan and assumed from acquisitions:
Restricted
Stock Units Outstanding(1)
Weighted 
Average
Grant Date
Fair Value		Weighted
Average
Remaining
Contractual
Life (In Years)		Aggregate
Fair
Value
 (in thousands, except per share amounts and years)
Balance at October 31, 20204,130 $134.80 1.47
Granted(2)
1,901 $258.58 
Vested(4)
(1,565)$122.01 $421,034 
Forfeited(279)$167.76 
Balance at October 31, 20214,187 $193.58 1.39
Granted(3)
2,402 $323.46 
Vested(4)
(1,589)$170.36 $529,766 
Forfeited(362)$228.70 
Balance at October 31, 20224,638 $265.76 1.32
Granted(3)
2,083 $394.34 
Vested(4)
(1,839)$237.19 $706,136 
Forfeited(365)$283.29 
Balance at October 31, 20234,517 $335.26 1.41
(1)No restricted stock units were assumed in connection with acquisitions in the last three fiscal years, but the balance at fiscal year-end includes certain restricted stock units that were previously assumed in connection with acquisitions.
(2)The number of granted restricted stock units includes those granted to senior management with performance-based vesting criteria (in addition to service-based vesting criteria) (performance-based RSUs) reported at the maximum possible number of shares that may ultimately be issuable if all applicable performance-based criteria are achieved at their maximum levels and all applicable service-based criteria are fully satisfied.
(3)The number of granted restricted stock units includes those granted to senior management with market-based and performance-based vesting criteria (in addition to service-based vesting criteria) (market-based RSUs) reported at the maximum possible number of shares that may ultimately be issuable if all applicable market-based and performance-based criteria are achieved at their maximum levels and all applicable service-based criteria are fully satisfied.
(4)The number of vested restricted stock units includes shares that were withheld on behalf of employees to satisfy the minimum statutory tax withholding requirements.
Stock Options The following table summarizes stock option activity and includes stock options granted under all equity plans:
 Options Outstanding
 
Shares Under Stock Option (1)
Weighted-
Average Exercise
Price per Share		Weighted-
Average
Remaining
Contractual
Life (In Years)		Aggregate
Intrinsic
Value
 (in thousands, except per share amounts and years)
Balance at October 31, 20203,993 $85.26 4.10$513,845 
Granted353 $239.46 
Exercised(1,203)$66.50 
Canceled/forfeited/expired(36)$128.49 
Balance at October 31, 20213,107 $109.51 3.81$694,921 
Granted293 $342.86 
Exercised(1,126)$86.24 
Canceled/forfeited/expired(114)$164.46 
Balance at October 31, 20222,160 $150.37 3.57$328,120 
Granted294 $361.64 
Exercised(849)$109.83 
Canceled/forfeited/expired(90)$245.86 
Balance at October 31, 20231,515 $208.49 3.70$376,563 
Vested and expected to vest as of October 31, 20231,515 $208.49 3.70$376,563 
Exercisable at October 31, 2023972 $142.41 2.67$305,738 
(1)No stock options were assumed in connection with acquisitions in the last three fiscal years, but the balance at fiscal year-end includes certain stock options that were previously assumed in connection with acquisitions.
The pre-tax intrinsic value of options exercised and their average exercise prices are:
 Year Ended October 31,
 202320222021
 (in thousands, except per share price)
Intrinsic value$241,385 $273,524 $254,587 
Average exercise price per share$109.83 $86.24 $66.50 
Restricted Stock Units and Stock Options The following table contains additional information concerning activities related to stock options and restricted stock units that were granted under the 2006 Employee Plan and assumed from acquisitions:
 
Available for Grant (1)(2)
 (in thousands)
Balance at October 31, 202012,129 
Options granted(2)
(353)
Options canceled/forfeited/expired(2)
36 
Restricted stock units granted(1)(3)
(3,232)
Restricted stock units forfeited(1)
471 
Additional shares reserved4,700 
Balance at October 31, 202113,751 
Options granted(2)
(286)
Options canceled/forfeited/expired(2)
114 
Restricted stock units granted(1)(4)
(4,083)
Restricted stock units forfeited(1)
615 
Additional shares reserved3,000 
Balance at October 31, 202213,111 
Options granted(2)
(294)
Options canceled/forfeited/expired(2)
89 
Restricted stock units granted(1)(4)
(3,540)
Restricted stock units forfeited(1)
620 
Additional shares reserved3,300 
Balance at October 31, 202313,286 
(1)Restricted stock units includes awards granted under the 2006 Employee Plan and assumed through acquisitions. The number of RSUs reflects the application of the award multiplier of 1.70 as described above.
(2)Options granted by us are not subject to the award multiplier ratio described above.
(3)The number of granted restricted stock units includes performance-based RSUs reported at the maximum possible number of shares that may ultimately be issuable if all applicable performance-based criteria are achieved at their maximum levels and all applicable service-based criteria are fully satisfied.
(4)The number of granted restricted stock units includes market-based RSUs reported at the maximum possible number of shares that may ultimately be issuable if all applicable market-based and performance-based criteria are achieved at their maximum levels and all applicable service-based criteria are fully satisfied.
Summary of Restricted Stock Award Activities Under 2005 Directors Plan
Restricted Stock Awards. The following table summarizes restricted stock award activities under the 2005 Directors Plan and 2017 Directors Plan:
Restricted
Shares		Weighted-Average
Grant Date Fair Value
 (in thousands, except per share amounts)
Unvested at October 31, 2020
9 $140.97 
Granted5 $261.01 
Vested(9)$140.97 
Forfeited— $— 
Unvested at October 31, 2021
5 $261.01 
Granted5 $310.02 
Vested(5)$261.01 
Forfeited— $— 
Unvested at October 31, 20225 $310.02 
Granted5 $387.79 
Vested(5)$310.02 
Forfeited— $— 
Unvested at October 31, 20235 $387.79 
Stock Option Plans and Stock Purchase Rights Granted Under ESPP
The assumptions presented in the following table are used to estimate the fair value of stock options and employee stock purchase rights granted under our stock plans:
 Year Ended October 31,
 202320222021
Stock Options:
Expected life (in years)
4.1
4.1
4.1
Risk-free interest rate
3.80%- 4.80%
1.07% - 4.42%
0.35% - 1.00%
Volatility
32.74% -36.16%
32.28% - 37.04%
29.19%- 32.28%
Weighted average estimated fair value
$120.33
$98.07
$61.58
ESPP:
Expected life (in years)
0.5 - 2.0
0.5 - 2.0
0.5 - 2.0
Risk-free interest rate
4.85% - 5.38%
0.67% - 3.44%
0.00% - 0.19%
Volatility
28.03% - 35.27%
34.51% - 38.69%
28.02% - 39.68%
Weighted average estimated fair value
$120.82
$102.63
$89.82
Schedule of Share-Based Payment Award, Restricted Stock Units, Valuation Assumptions
The grant date fair value of the market-based RSUs and the assumptions used in the Monte Carlo simulation model to determine the grant date fair value during the periods are as follows:
 Year Ended October 31,
 20232022
2021(1)
Expected life (in years)
0.90 - 2.70
 1.16 - 1.69
—
Risk-free interest rate
4.36% - 4.80%
1.33% - 3.46%
—
Volatility
34.79% - 42.86%
33.01% - 37.80%
—
Grant date fair value
$357.29 - $465.79
$280.52 - $412.2
—
(1)    No market-based RSUs were granted in fiscal 2021.
Stock Compensation Expense
The compensation cost recognized in the consolidated statements of income for our stock compensation arrangements is as follows:
 Year Ended October 31,
 202320222021
 (in thousands)
Cost of products$65,221 $55,134 $38,345 
Cost of maintenance and service29,572 24,146 13,817 
Research and development expense294,154 241,978 171,013 
Sales and marketing expense106,574 81,617 61,940 
General and administrative expense67,771 56,154 60,157 
Stock-based compensation expense before taxes563,292 459,029 345,272 
Income tax benefit(90,915)(74,271)(53,483)
Stock-based compensation expense after taxes$472,377 $384,758 $291,789 
Deferred Plan Assets and Liabilities
Deferred plan assets and liabilities are as follows:
As of October 31,
20232022
 (in thousands)
Plan assets recorded in other long-term assets$300,731 $279,096 
Plan liabilities recorded in other long-term liabilities(1)
$300,731 $279,096 
(1)Undistributed deferred compensation balances due to participants.
Summary of Impact of Deferred Plan The following table summarizes the impact of the Deferred Plan:
 Year Ended October 31,
 202320222021
 (in thousands)
Increase (reduction) to cost of revenue and operating expense$20,488 $(68,778)$71,603 
Other income (expense), net20,488 (68,778)71,603 
Net increase (decrease) to net income$— $— $—