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Equity-Based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Stock Options
Outstanding at beginning of period (in shares)	8,222,322
Granted (in shares)	1,286,629
Exercised (in shares)	(460,760)
Forfeited (in shares)	(471,521)
Outstanding at end of period (in shares)	8,576,670	8,222,322
Options exercisable at end of period (in shares)	5,586,736
Weighted Average Exercise Price
Outstanding at beginning of period, weighted average exercise price (in USD per share)	$ 25.16	$ 25.07
Granted, weighted average exercise price (in USD per share)	24.13
Exercised, weighted average exercise price (in USD per share)	18.14
Forfeited, weighted average exercise price (in USD per share)	27.69
Outstanding at end of period, weighted average exercise price (in USD per share)	25.16	$ 25.07
Exercisable, weighted average exercise price (in USD per share)	$ 24.79

X

- Definition

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.

+ References

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-Topic 718
-SubTopic 10
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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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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.

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

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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 price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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

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