Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 27, 2024	Apr. 29, 2023	Apr. 30, 2022
Allowance for uncollectible accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 1.3	$ 1.0	$ 0.7
(Benefits)/ charges to income	0.3	0.3	0.3
Deductions	(0.2)	0.0	0.0
Other	0.0	0.0	0.0
Balance at end of period	1.4	1.3	1.0
Deferred tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	6.8	6.8	9.3
(Benefits)/ charges to income	(1.0)	0.0	(2.5)
Deductions	0.0	0.0	0.0
Other	0.0	0.0	0.0
Balance at end of period	$ 5.8	$ 6.8	$ 6.8