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Derivative Financial Instruments and Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2024

Derivative Financial Instruments and Fair Value Measurements

Schedule of notional principle, fixed rates and related expiration dates of outstanding interest rate swap agreements


September 30, 2024
Notional Amount		Notional Amount			Fixed		Effective		Expiration
Currency		(in millions)			Rate		Date		Date
USD			400.0		1.283	%	February 2023		March 2028


September 30, 2023
Notional Amount		Notional Amount			Fixed		Effective		Expiration
Currency		(in millions)			Rate		Date		Date
USD			400.0		1.283	%	February 2023		March 2028

Schedule of non-pension financial assets and liabilities recorded at fair value on a recurring basis


		As of September 30, 2024
				Quoted Prices in						Significant
				Active Markets for			Significant			Unobservable
				Identical Assets			Observable			Inputs			Total
		Balance Sheet Location		(Level 1)			Inputs (Level 2)			(Level 3)			Fair Value

		(in millions)
Interest rate contracts		Other current assets		$	—		$	9.2		$	—		$	9.2
Interest rate contracts		Other non-current assets			—			16.5			—			16.5
Interest rate contracts		Other current liabilities			—			(0.9)			—			(0.9)
Interest rate contracts		Other long-term liabilities			—			(3.6)			—			(3.6)
Credit facility investment		Other non-current assets			—			—			21.9			21.9
Equity investment		Other non-current assets			19.4			—			—			19.4
Total net assets at fair value				$	19.4		$	21.2		$	21.9		$	62.5


		As of September 30, 2023
				Quoted Prices in						Significant
				Active Markets for			Significant			Unobservable
				Identical Assets			Observable			Inputs				Total
		Balance Sheet Location		(Level 1)			Inputs (Level 2)			(Level 3)			Fair Value

		(in millions)
Interest rate contracts		Other current assets		$	—		$	17.2		$	—		$	17.2
Interest rate contracts		Other non-current assets			—			37.5			—			37.5
Total net assets at fair value				$	—		$	54.7		$	—		$	54.7

Schedule of changes in the fair value of the Company's Level 3 investment assets


		Year-ended September 30, 2024
		Beginning			Investment
		Balance			Gains/(Losses)		Interest Earned		Purchases		Sales		Ending Balance

			(in millions)
Credit facility investment including accrued interest		$	—		0.5		0.5		32.5		(11.6)		$	21.9

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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