CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 18.6	$ (7.5)	$ 18.0	$ (51.7)
Other comprehensive income (loss), net of tax:
Pension and postretirement benefits, net of tax of $(0.4), $(0.4), $(1.3) and $(1.2), respectively	1.1	1.1	3.2	3.0
Net (loss) gain on derivative instruments, net of tax of $3.5, $(8.6), $3.1 and $(9.5), respectively	(10.9)	27.2	(9.7)	30.0
Foreign currency translation	2.3	0.1	5.9	(2.7)
Total other comprehensive (loss) income, net of tax	(7.5)	28.4	(0.6)	30.3
Comprehensive income (loss), net of tax	$ 11.1	$ 20.9	$ 17.4	$ (21.4)