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Stock Based Compensation - Balance of Outstanding and Exercisable Stock Options (Detail)
$ / shares in Units, $ in Millions
 9 Months Ended
Mar. 31, 2017
USD ($)
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock Option Awards Outstanding, Balance as of June 30, 2016 | shares 2,711,542
Stock Option Awards Outstanding, Granted | shares 259,226
Stock Option Awards Outstanding, Exercised | shares (275,460)
Stock Option Awards Outstanding, Forfeited | shares (127,763)
Stock Option Awards Outstanding, Balance as of March 31, 2017 | shares 2,567,545
Stock Option Awards Outstanding, Exercisable at March 31, 2017 | shares 1,997,524
Weighted Average Exercise Price, Balance as of June 30, 2016 | $ / shares $ 46.69
Weighted Average Exercise Price, Granted | $ / shares 53.09
Weighted Average Exercise Price, Exercised | $ / shares 27.70
Weighted Average Exercise Price, Forfeited | $ / shares 71.35
Weighted Average Exercise Price, Balance as of March 31, 2017 | $ / shares 48.15
Weighted Average Exercise Price, Exercisable at March 31, 2017 | $ / shares $ 42.33
Aggregate Intrinsic Value, Balance as of March 31, 2017 | $ $ 28.9
Aggregate Intrinsic Value, Exercisable at March 31, 2017 | $ $ 28.9