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Organization and Summary of Significant Accounting Policies - Schedule of Cumulative Translation Adjustments Included in Other Comprehensive Income (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent [Abstract]      
Beginning Balance $ (7.0)    
Period translation adjustments (2.6) $ (5.2) $ (1.7)
Ending balance $ (9.6) $ (7.0)