Derivative Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative instruments in condensed consolidated balance sheets

	September 30, 2021
Other current liabilities	$	4.7
Other liabilities	1.1
Total liabilities	$	5.8

Derivative Instruments, Loss (Gain)

	Statement of Operations Location	Three Months Ended March 31,				Six Months Ended March 31,
Net Hedging (Gains) Losses		2022		2021		2022		2021
Mark-to-market adjustments	Interest expense, net	$	(1.4)	$	(0.1)	$	(2.3)	$	(0.1)
Net loss reclassified from accumulated OCI	Interest expense, net	0.5		0.6		1.0		1.1
Net loss reclassified from accumulated OCI	Loss on extinguishment and refinancing of debt, net	6.1		—		6.1		—
Tax benefit reclassified from accumulated OCI	Income tax expense	(0.4)		—		(0.4)		—
Total net hedging losses, net of tax		$	4.8	$	0.5	$	4.4	$	1.0
Cash settlements paid, net		$	(0.7)	$	(1.2)	$	(2.0)	$	(2.4)