Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities at Fair Value

The following tables set forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis by level within the fair value hierarchy:

	As of December 31, 2022
(In millions)	Total		Level 1		Level 2		Level 3		NAV (a)
Cash and cash equivalents
Money market funds	$	0.4	$	0.4	$	—	$	—	$	—
Time deposits	8.6		—		8.6		—		—
Prepaid expenses and other current assets
Currency derivatives (b)	2.6		—		2.6		—		—
Interest rate swap agreements	4.0		—		4.0		—		—
Other noncurrent assets
Non-qualified trust funds	5.7		—		—		—		5.7
Interest rate swap agreements	12.0		—		12.0		—		—
Total assets at fair value	$	33.3	$	0.4	$	27.2	$	—	$	5.7
Accrued expenses and other liabilities
Currency derivatives (b)	$	2.7	$	—	$	2.7	$	—	$	—
Other noncurrent liabilities
Deferred compensation obligations	20.5		—		—		—		20.5
Total liabilities at fair value	$	23.2	$	—	$	2.7	$	—	$	20.5

	As of September 30, 2022
(In millions)	Total		Level 1		Level 2		Level 3		NAV (a)
Cash and cash equivalents
Money market funds	$	0.4	$	0.4	$	—	$	—	$	—
Time deposits	13.3		—		13.3		—		—
Prepaid expenses and other current assets
Currency derivatives (b)	6.0		—		6.0		—		—
Interest rate swap agreements	5.2		—		5.2		—		—
Other noncurrent assets
Non-qualified trust funds	6.4		—		—		—		6.4
Interest rate swap agreements	12.6		—		12.6		—		—
Total assets at fair value	$	43.9	$	0.4	$	37.1	$	—	$	6.4
Accrued expenses and other liabilities
Currency derivatives (b)	$	5.2	$	—	$	5.2	$	—	$	—
Other noncurrent liabilities
Deferred compensation obligations	19.6		—		—		—		19.6
Total liabilities at fair value	$	24.8	$	—	$	5.2	$	—	$	19.6

(a)Funds measured at fair value using the net asset value ("NAV") per share practical expedient have not been classified in the fair value hierarchy.

(b)The Company had outstanding contracts with notional values of $154.5 million and $150.5 million as of December 31, 2022 and September 30, 2022, respectively.

Summary of Fair Value of Debt

	December 31, 2022						September 30, 2022
(In millions)	Fair value		Carrying value (a)		Unamortized discounts and issuance costs		Fair value		Carrying value (a)		Unamortized discounts and issuance costs
2030 Notes	$	586.1	$	593.9	$	(6.1)	$	568.5	$	593.7	$	(6.3)
2031 Notes	433.1		529.4		(5.6)		400.5		529.2		(5.8)
Total	$	1,019.2	$	1,123.3	$	(11.7)	$	969.0	$	1,122.9	$	(12.1)

(a)Carrying values shown are net of unamortized discounts and debt issuance costs.