CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016
Statement Of Financial Position [Abstract]
Trade receivables allowance	$ 8.0	$ 7.5
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, shares authorized	50,000,000	50,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	850,000,000	850,000,000
Common stock, shares issued	243,119,508	242,649,498
Common stock, shares outstanding	243,119,508	242,649,498