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Retirement Plans (Tables)

9 Months Ended

Jun. 30, 2025

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The components of net periodic cost for our Pension Plan are presented below:

			Three months ended												Nine months ended
			June 30,												June 30,
			2025						2024						2025						2024
			(in millions)
Service cost			$	0.2					$	0.2					$	0.5					$	0.5
Pension expense (benefit) other than service:
Interest cost			3.0						3.5						9.0						10.5
Expected return on plan assets			(3.6)						(3.3)						(10.8)						(9.9)
Amortization of actuarial net loss			0.6						0.8						1.7						2.4
Pension expense (benefit) other than service			—						1.0						(0.1)						3.0
Net periodic cost			$	0.2					$	1.2					$	0.4					$	3.5

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 715
-SubTopic 20
-Subparagraph (h)
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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