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Share-Based Compensation - Phantom Stock Units - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Dec. 31, 2019
Dec. 27, 2019
Jun. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Fair value of outstanding stock units $ 62.84   $ 59.07
Phantom Stock Unit [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Vesting period of the underlying awards 3 years    
Fair value of outstanding stock units $ 62.02    
Accrued liability for outstanding stock units $ 3.0    
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding   $ 66.89  
Unrecognized share-based compensation cost $ 53.3    
Unrecognized share-based compensation, period for recognition 2 years 9 months 18 days