Fair Value Measurements - Level 3 Investments (Details) $ in Millions	12 Months Ended
	Apr. 27, 2019 USD ($) company
Joybird
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Increase in fair value of liability | $	$ 0.4
Discount rate for fiscal 2021 milestone contingent consideration	4.20%
Discount rate for fiscal 2023 milestone contingent consideration	4.70%
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Preferred share investments, number of privately-held companies	2
Preferred share investments with common share warrant, number of privately-held companies	1