CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (6.2)	$ 8.9
Other comprehensive income (loss), net of tax
Pension and postretirement benefits, net of tax of $(10.5) and $(2.3), respectively	17.4	3.7
Net gain (loss) on derivative instruments, net of tax of $(6.5) and $3.4, respectively	10.8	(5.5)
Foreign currency translation	(0.7)	(3.3)
Other comprehensive income (loss)	27.5	(5.1)
Comprehensive income	$ 21.3	$ 3.8