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Equity Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense recognized	$ 8.3	$ 102.0	$ 0.6
Income tax benefit recognized	1.3	$ 0.2	$ 0.0
Unrecognized equity-based compensation	9.4
Unrecognized share-based payment expense, fiscal 2021	5.0
Unrecognized share-based payment expense, fiscal 2022	2.8
Unrecognized share-based payment expense, thereafter	$ 1.6
Unrecognized share-based payment expense, weighted-average period	1 year 1 month 28 days
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
Time-Vesting and Performance-Vesting Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental fair value of the modification of awards	$ 95.1
Fair value of awards vested	$ 4.2
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares, vesting period	3 years
Contractual term, description	Stock options generally have terms of 10 years, with one-third of each grant vesting each year for three years
Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of awards	10 years
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares, vesting period	3 years	3 years
Shareholder return performance measurement period	3 years	3 years
Performance Share Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares, vesting percentage per annum	150.00%	150.00%
Performance Share Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares, vesting percentage per annum	0.00%	0.00%
Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	$ 2.1	$ 8.5
Weighted average grant date fair value		$ 29.77
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value	$ 31.34	$ 14.24
Former Skyline Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense recognized		$ 6.0

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