CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (47.1)	$ 41.2
Other comprehensive (loss) income, net of tax
Pension and postretirement benefits, net of tax of $(1.1) and $(1.0), respectively	3.6	3.0
Net gain on derivative instruments, net of tax of $(2.7) and $(8.5), respectively	8.3	26.7
Foreign currency translation gain (loss)	5.7	(5.5)
Other comprehensive income, net of tax	17.6	24.2
Comprehensive (loss) income	$ (29.5)	$ 65.4