CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 6.3	$ 18.6	$ 92.9	$ 18.0
Other comprehensive income (loss), net of tax:
Net gain (loss) on derivative instruments, net of tax of $(0.7), $3.5, $0.5 and $3.1, respectively	2.3	(10.9)	(1.4)	(9.7)
Pension and postretirement benefits, net of tax of $(8.4), $(0.4), $(9.0) and $(1.3), respectively	27.0	1.1	28.6	3.2
Foreign currency translation	(2.2)	2.3	0.5	5.9
Total other comprehensive income (loss), net of tax	27.1	(7.5)	27.7	(0.6)
Comprehensive income, net of tax	$ 33.4	$ 11.1	$ 120.6	$ 17.4