CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (14.8)	$ (47.1)
Other comprehensive income (loss), net of tax
Pension and postretirement benefits, net of tax of $(0.4) and $(1.1), respectively	1.1	3.6
Net gain on derivative instruments, net of tax of $(0.4) and $(2.7) respectively	1.1	8.3
Foreign currency translation	(2.1)	5.7
Other comprehensive income, net of tax	0.1	17.6
Comprehensive loss	$ (14.7)	$ (29.5)