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INCOME TAXES (Tables)

12 Months Ended

Sep. 30, 2025

Income Tax Disclosure [Abstract]

Provision (Benefit) For Income Taxes Allocated to Continuing Operations

The provision (benefit) for income taxes consisted of the following:

			Year Ended September 30,
			2025						2024						2023
Current:
Federal			$	(5.4)					$	2.4					$	3.7
State			2.5						2.5						0.6
Foreign			2.6						(5.3)						1.6
Total current			(0.3)						(0.4)						5.9
Deferred:
Federal			60.3						11.6						(62.1)
State			10.1						(3.8)						(5.2)
Foreign			6.4						3.9						(11.8)
Total deferred			76.8						11.7						(79.1)
Income tax expense (benefit)			$	76.5					$	11.3					$	(73.2)

The Domestic and Foreign Components of Income From Continuing Operations Before Income Taxes

The domestic and foreign components of income (loss) before income taxes were as follows:

			Year Ended September 30,
			2025						2024						2023
Domestic			$	249.1					$	(10.8)					$	(376.2)
Foreign			(27.4)						(12.8)						(77.1)
Income (loss) before income taxes			$	221.7					$	(23.6)					$	(453.3)

Reconciliation of the Federal Corporate Income Tax Rate and the Effective Tax Rate

A reconciliation of the federal corporate income tax rate and the effective tax rate on income (loss) before income taxes is summarized below:

			Year Ended September 30,
			2025						2024						2023
Statutory income tax rate			21.0		%				21.0		%				21.0		%
Effect of foreign operations			0.3						(2.0)						0.2
State taxes, net of federal benefit			5.5						8.0						3.2
Effect of other permanent differences			2.2						(32.8)						(0.8)
Research and Experimentation and other federal tax credits			(0.3)						2.9						0.2
Effect of tax contingencies			(0.5)						3.7						0.1
Change in valuation allowances			5.4						(57.4)						(8.7)
Other			0.9						8.7						1.0
Effective income tax rate			34.5		%				(47.9)		%				16.2		%

Components of Deferred Income Tax Assets and Liabilities

Deferred income taxes arise from temporary differences between financial reporting and tax reporting bases of assets and liabilities, and operating loss and tax credit carryforwards for tax purposes. The components of the deferred income tax assets and liabilities were as follows:

			September 30,
			2025						2024
DEFERRED TAX ASSETS
Lease liabilities			$	69.4					$	67.6
Outside basis difference in equity investments			62.7						23.1
Interest limitation carryforward			59.6						55.9
Accrued liabilities			43.8						43.2
Net operating loss carryovers			39.6						56.4
Foreign tax credit carryovers			13.7						15.2
Intangible assets			13.6						62.2
Inventories			13.4						16.1
Convertible debt investments			4.7						43.6
Other			22.2						22.4
Gross deferred tax assets			342.7						405.7
Valuation allowance			(96.8)						(96.5)
Total deferred tax assets			245.9						309.2
DEFERRED TAX LIABILITIES
Lease right-of-use assets			(65.0)						(62.0)
Property, plant and equipment			(62.3)						(58.5)
Other			(5.1)						(4.4)
Total deferred tax liabilities			(132.4)						(124.9)
Net deferred tax asset			$	113.5					$	184.3

Schedule of Unrecognized Tax Benefits Roll Forward

A reconciliation of the unrecognized tax benefits is as follows:

			Year Ended September 30,
			2025						2024						2023
Balance at beginning of year			$	25.7					$	34.6					$	35.8
Additions for tax positions of the current year			0.2						0.2						0.2
Additions for tax positions of prior years			—						0.1						3.8
Reductions for tax positions of prior years			—						(3.7)						(0.2)
Settlements with tax authorities			—						(0.7)						(0.1)
Expiration of statutes of limitation			(3.1)						(4.8)						(4.9)
Balance at end of year			$	22.8					$	25.7					$	34.6

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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