Summary of Stock Option Activity (Detail) - Stock Option Awards $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2025 USD ($) $ / shares shares
Options outstanding, shares
Beginning Balance \| shares	4,956
Granted \| shares	47
Exercised \| shares	(271)
Forfeited/Expired \| shares	(172)
Ending Balance \| shares	4,560
Exercisable as of March 31, 2025 \| shares	3,172
Expected to vest as of March 31, 2025 \| shares	1,388
Total \| shares	4,560
Weighted Average Exercise Price Per Share
Beginning Balance \| $ / shares	$ 38.56
Granted \| $ / shares	290.23
Exercised \| $ / shares	34.79
Forfeited/Expired \| $ / shares	46.75
Ending Balance \| $ / shares	41.07
Exercisable as of September 30, 2024 \| $ / shares	39.06
Expected to vest as of September 30, 2024 \| $ / shares	30.13
Total \| $ / shares	$ 41.07
Aggregate Intrinsic Value
Exercised \| $	$ 76,994
Exercisable as of September 30, 2024 \| $	790,531
Expected to vest as of September 30, 2024 \| $	337,652
Total \| $	$ 1,128,183
Weighted Average Remaining Contractual Term (Years)
Exercisable as of September 30, 2024	5 years 8 months 12 days
Expected to vest as of September 30, 2024	7 years 4 months 24 days
Total	6 years 2 months 12 days

Share-based compensation arrangement by share-based payment award, options, aggregate intrinsic value.

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Aggregate intrinsic value of share options expected to vest at the date of the latest statement of financial position. Excludes options already vested.

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Share options expected to vest at the date of the latest statement of financial position. In other words, unvested shares, net of expected forfeitures.

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Weighted average exercise price of share options expected to vest at the date of the latest statement of financial position. Excludes options already vested.

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Weighted average remaining contractual term of share options expected to vest at the date of the latest statement of financial position. Excludes options already vested.

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Share-based compensation arrangement by share-based payment award options outstanding weighted average remaining contractual term.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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