Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2024

Fair Value Disclosures [Abstract]

Schedule of financial assets and liabilities at carrying value and fair value and the level within the fair value hierarchy

	Carrying Value at September 30, 2024		Fair Value at September 30, 2024
			Using Inputs Considered as:
			Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	199.3	$	199.3	$	—	$	—
DPP receivables	6.7		—		6.7		—
Restricted cash	1.1		1.1		—		—
Restricted cash for benefit plan contributions	27.5		27.5		—		—
Investments in rabbi trust	4.8		4.8		—		—
Derivative instruments	19.0		—		19.0		—
Liabilities:
Revolving Credit Facility	298.5		—		298.5		—
$200 term loan	182.5		—		182.5		—
€185 term loan	196.5		—		196.5		—
$350 senior unsecured notes	350.0		312.9		—		—
$375 senior unsecured notes	374.8		373.7		—		—
$500 senior unsecured notes	500.0		509.8		—		—
Derivative instruments	40.5		—		40.5		—
Contingent consideration	14.6		—		—		14.6

	Carrying Value at September 30, 2023		Fair Value at September 30, 2023
			Using Inputs Considered as:
			Level 1		Level 2		Level 3
Assets:
Cash and cash equivalents	$	242.9	$	242.9	$	—	$	—
Restricted cash	7.3		7.3		—		—
Investments in rabbi trust	3.3		3.3		—		—
Derivative instruments	1.5		—		1.5		—
Liabilities:
Revolving Credit Facility	505.1		—		505.1		—
$200 term loan	192.5		—		192.5		—
€185 term loan	195.0		—		195.0		—
$350 senior unsecured notes	350.0		281.6		—		—
$400 senior unsecured notes	400.0		395.1		—		—
$375 senior unsecured notes	374.7		355.0		—		—
Derivative instruments	1.7		—		1.7		—