Financial Instruments and Risk Management (Tables)

6 Months Ended

Mar. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Values of Derivative Instruments

The following table provides estimated fair values of derivative instruments:


	Fair Value of Assets (Liabilities) as of (1)
	March 31, 2025		September 30, 2024
Derivatives designated as cash flow hedging relationships:
Foreign currency contracts	$	0.7	$	(2.4)
Derivatives not designated as cash flow hedging relationships:
Foreign currency contracts	$	—	$	0.1

(1)Derivative assets are presented in Other current assets or Other assets. Derivative liabilities are presented in Other current liabilities or Other liabilities.

Schedule of Gains and Losses on Derivative Instruments

The following table provides the pre-tax amounts of gains and losses on derivative instruments:


	Three Months Ended March 31,				Six Months Ended March 31,
	2025		2024		2025		2024
Derivatives designated as cash flow hedging relationships:
Foreign currency contracts
(Loss) gain recognized in OCI (1)	$	(2.8)	$	4.8	$	4.9	$	1.5
Gain reclassified from AOCI into income (1) (2)	1.2		0.8		1.7		2.4
Derivatives not designated as cash flow hedging relationships:
Foreign currency contracts
Gain recognized in income (2)	$	(0.3)	$	1.7	$	0.6	$	0.6

(1)Each of these derivative instruments had a high correlation to the underlying exposure being hedged for the periods indicated and have been deemed highly effective by the Company in offsetting associated risk.

(2)Gain was recorded in Other (income) expense, net in the Condensed Consolidated Statements of Earnings and Comprehensive (Loss) Income.

Schedule of Offsetting Assets and Liabilities

The following table provides financial assets and liabilities for balance sheet offsetting:


	As of March 31, 2025				As of September 30, 2024
	Assets (1)		Liabilities (2)		Assets (1)		Liabilities (2)
Foreign currency contracts
Gross amounts of recognized assets (liabilities)	$	1.6	$	(0.8)	$	0.1	$	(2.7)
Gross amounts offset in the balance sheet	0.1		(0.2)		—		0.3
Net amounts of assets (liabilities) presented in the balance sheet	$	1.7	$	(1.0)	$	0.1	$	(2.4)

(1)All derivative assets are presented in Other current assets or Other assets on the Condensed Consolidated Balance Sheets.

(2)All derivative liabilities are presented in Other current liabilities or Other liabilities on the Condensed Consolidated Balance Sheets.

Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis

The following table sets forth the Company’s financial assets and liabilities, which are carried at fair value and measured on a recurring basis during the period, all of which are classified as Level 2 within the fair value hierarchy:


	March 31, 2025		September 30, 2024
Assets (Liabilities) at estimated fair value:
Deferred compensation liability	$	(20.3)	$	(21.1)
Derivatives - foreign currency contracts asset	0.7		(2.3)
Net assets (liabilities) at estimated fair value	$	(19.6)	$	(23.4)