Summary of Significant Accounting Policies (Details)	12 Months Ended
	Apr. 30, 2021 USD ($) plan	Apr. 30, 2020 USD ($)	Apr. 30, 2019 USD ($)	May 01, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Advertising costs	$ 34,100,000	$ 33,900,000	$ 38,900,000
Impairment of long-lived assets	0	0	0
Impairment of goodwill	0	0	0
Impairment of intangible assets	$ 0	0	0
Number of defined benefit pension plans | plan	2
Operating lease right-of-use assets	$ 123,118,000	127,668,000
Operating lease liability	$ 129,622,000
Accounting Standards Update 2016-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use assets				$ 80,400,000
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	6 years
Buildings And Improvements [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment useful lives	15 years
Buildings And Improvements [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment useful lives	30 years
Machinery And Equipment [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment useful lives	3 years
Machinery And Equipment [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment useful lives	12 years
Promotional Display [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization	$ 10,000,000.0	$ 8,200,000	$ 6,400,000
Promotional Display [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment useful lives	60 months
Foreign Exchange Contract | Not Designated as Hedging Instrument
Summary Of Significant Accounting Policies [Line Items]
Derivative, Notional Amount	$ 0