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Acquired Intangibles - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]        
Acquired intangibles amortization $ 18.8 $ 46.6 $ 37.9 $ 47.9