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Equity Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 6 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Equity-based compensation expense recognized $ 85.8 $ 0.2 $ 93.9 $ 0.3
Time Vesting Restricted Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted shares, vesting percentage per annum     20.00%  
Restricted shares, vesting period     5 years  
Unvested restricted shares issued 464,000   464,000  
Unvested restricted shares, weighted average grant date fair value $ 32.03   $ 32.03  
Unvested restricted shares, average remaining service period     12 months