CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 42.7	$ 6.2	$ 86.6	$ (0.6)
Other comprehensive income (loss), net of tax:
Pension and postretirement benefits, net of tax of $(0.3), $(0.4), $(0.6) and $(0.8), respectively	0.8	1.1	1.6	2.1
Net (loss) gain on derivative instruments, net of tax of $0.8, $(2.1), $1.2 and $(0.4), respectively	(2.5)	6.5	(3.7)	1.2
Foreign currency translation	4.8	6.9	2.7	3.6
Total other comprehensive income, net of tax	3.1	14.5	0.6	6.9
Comprehensive income, net of tax	$ 45.8	$ 20.7	$ 87.2	$ 6.3