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EQUITY - Restricted Shares Issued to Vendor (Details) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards granted, other than options (in shares)	479,787
Weighted average grant date fair value (in USD per share)	$ 59.48	$ 109.10	$ 230.95
Compensation costs net yet recognized	$ 16.5
Vendor
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards granted, other than options (in shares)	800,000
Weighted average grant date fair value (in USD per share)	$ 52.44
Compensation costs net yet recognized	$ 20.7

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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