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Fair Value Measurements - Additional Information (Details) - USD ($)	9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair value, assets, level 1 to level 2 transfers	$ 0	$ 0	$ 0
Fair value, assets, level 2 to level 1 transfers	0	0	0
Fair value, assets, level 2 to level 3 transfers	0	0	0
Fair value, assets, level 3 to level 2 transfers	0	0	0
Fair value, assets, level 1 to level 3 transfers	0	0	0
Fair value, assets, level 3 to level 1 transfers	0	0	0
Fair value, liabilities, level 1 to level 2 transfers	0	0	0
Fair value, liabilities, level 2 to level 1 transfers	0	0	0
Fair value, liabilities, level 2 to level 3 transfers	0	0	0
Fair value, liabilities, level 3 to level 2 transfers	0	0	0
Fair value, liabilities, level 1 to level 3 transfers	0	0	0
Fair value, liabilities, level 3 to level 1 transfers	0	0	0
Reclassified out of accumulated other comprehensive income	0	0
Assets held for sale	7,100,000	$ 0
Accrued Expenses [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Contingent consideration liabilities	77,900,000		5,300,000
Other Long-term Liabilities [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Contingent consideration liabilities	$ 8,800,000		$ 80,700,000

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- Definition

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+ References

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- Definition

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 3.

+ References

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- Definition

Fair value assets level 2 to level1 transfer amount.

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Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 3.

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Amount of transfers of assets measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 1.

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Amount of transfers of assets measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 2.

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Fair value liabilities level1 to level2 transfer amount.

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Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 3.

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Fair value liabilities level 2 to level1 transfer amount.

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Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 3.

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- Definition

Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
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Amount of liability recognized arising from contingent consideration in a business combination.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.

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