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STOCK-BASED COMPENSATION - Summary of the Status of Performance Share Units and Changes in Performance Share Units Outstanding (Details) - Performance Share Units shares in Thousands	6 Months Ended
	Mar. 31, 2020 $ / shares shares
Shares
Outstanding (in shares) | shares	145
Granted (in shares) | shares	259
Outstanding (in shares) | shares	404
Weighted Average Grant Date Fair Value per Share
Outstanding (in dollars per share) | $ / shares	$ 62.66
Granted (in dollars per share) | $ / shares	43.40
Outstanding (in dollars per share) | $ / shares	$ 50.31

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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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-Publisher FASB
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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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