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Income Taxes (Tables)

12 Months Ended

Sep. 30, 2025

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense

Income tax expense consisted of the following for the years ended September 30:

(In millions)						2025						2024						2023
Current
Federal						$	24.5					$	34.7					$	8.0
State						11.7						8.3						(5.5)
Non-U.S.						3.0						2.6						1.0
						39.2						45.6						3.5
Deferred
Federal						31.5						20.8						36.8
State						5.8						2.7						(3.2)
Non-U.S.						1.0						—						—
						38.3						23.5						33.6
Income tax expense						$	77.5					$	69.1					$	37.1

Schedule and Reconciliation of the Statutory Federal Income Tax

The following presents pre-tax income and the principal components of the reconciliation between the effective tax rate and the U.S. federal statutory income tax rate in effect for the years ended September 30:

(In millions)						2025						2024						2023
Income before income taxes
United States						$	281.4					$	286.5					$	242.7
Non-U.S.						10.9						(2.9)						(6.2)
Total income before income taxes						$	292.3					$	283.6					$	236.5
U.S. statutory tax rate						21		%				21		%				21		%
Income taxes computed at U.S. statutory tax rate						$	61.4					$	59.6					$	49.7
(Decrease) increase in amount computed resulting from:
Unrecognized tax benefits						—						0.1						0.1
State taxes, net of federal benefit						15.0						9.2						11.2
International rate differential						0.7						(0.1)						0.1
Permanent items						1.3						1.7						0.1
Remeasurement of net deferred taxes						—						(0.1)						(1.1)
Return-to-provision adjustments						(0.1)						(0.7)						(0.9)
Change in valuation allowances						0.1						(1.7)						(27.7)
Tax Matters Agreement activity						(0.1)						—						5.4
Other						(0.8)						1.1						0.2
Income tax expense						$	77.5					$	69.1					$	37.1
Effective tax rate						26.5		%				24.4		%				15.7		%

Schedule of Deferred Tax Assets and Liabilities

A summary of the deferred tax assets and liabilities included in the Consolidated Balance Sheets follows as of September 30:

(In millions)						2025						2024
Deferred tax assets
U.S. net operating loss carryforwards						$	3.2					$	—
Non-U.S. net operating loss carryforwards (a)						0.5						2.9
State net operating loss carryforwards (b)						5.7						6.9
Employee benefit obligations						37.6						33.9
Compensation accruals						16.6						15.8
Credit carryforwards (c)						—						0.3
Operating lease liabilities						123.3						107.9
Other						14.5						10.3
Valuation allowances (d)						(4.8)						(1.0)
Net deferred tax assets						196.6						177.0
Deferred tax liabilities
Goodwill and other intangibles						33.6						25.9
Property, plant and equipment						196.0						154.1
Operating lease assets						84.0						75.4
Other						—						0.2
Total deferred tax liabilities						313.6						255.6
Total net deferred tax liabilities (e)						$	(117.0)					$	(78.6)

(a)Gross non-U.S. net operating loss carryforwards of $1.7 million expire in fiscal years 2043 to 2044.

(b)Apportioned gross state net operating loss carryforwards of $108.1 million expire in fiscal years 2029 to 2045.

(c)Credit carryforwards consist primarily of state tax credits that generally expire in fiscal years 2025 through 2032.

(d)Valuation allowances at September 30, 2025 primarily relate to nondeductible executive compensation and net operating loss carryforwards that are not expected to be realized or realizable.

(e)Balances are presented in the Consolidated Balance Sheets based on the net position of each tax jurisdiction.

Schedule of Gross Unrecognized Tax Benefits

The aggregate changes in the balance of gross unrecognized tax benefits were as follows for the years ended September 30:

(In millions)						2025						2024						2023
Gross unrecognized tax benefits as of October 1						$	33.1					$	35.7					$	8.2
Increases related to tax positions from prior years						—						0.1						0.6
Decreases related to tax positions from prior years						—						(2.1)						(0.6)
Increases related to tax positions taken during the current year						—						—						27.7
Lapses of statutes of limitation						(0.3)						(0.6)						(0.2)
Gross unrecognized tax benefits as of September 30 (a)						$	32.8					$	33.1					$	35.7

(a)These unrecognized tax benefits would favorably impact the effective income tax rate, primarily for discontinued operations, if recognized. Accruals for interest and penalties were $6.5 million and $1.8 million as of September 30, 2025 and 2024, respectively.

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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 the change in unrecognized tax benefits.

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