CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 11.5	$ 24.1	$ 20.4	$ 37.6
Other comprehensive income (loss), net of tax
Pension and postretirement benefits, net of tax of $(2.3), $(1.9), $(4.6) and $(3.7), respectively	3.7	2.9	7.4	5.9
Net loss on derivative instruments, net of tax of $3.4, $4.3, $6.8 and $15.3, respectively	(5.7)	(7.3)	(11.2)	(25.5)
Foreign currency translation	(2.3)	(10.1)	(5.6)	(18.0)
Other comprehensive loss	(4.3)	(14.5)	(9.4)	(37.6)
Comprehensive income	$ 7.2	$ 9.6	$ 11.0	$ 0.0