CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Comprehensive Income Net Of Tax [Abstract]
Net loss	$ (76.2)	$ (155.3)	$ (179.3)
Foreign currency translation adjustment	12.4	(22.3)	19.2
Comprehensive loss	$ (63.8)	$ (177.6)	$ (160.1)