Condensed Consolidated Financial Statements (Details) $ in Millions		1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 08, 2020	Apr. 30, 2020	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020 USD ($)	Apr. 30, 2021	Jul. 31, 2020 USD ($)	Apr. 30, 2021
Line of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Drawings					$ 500.0		$ 500.0
Change in interest rate (percent)				0.10%
E-Commerce
Line of Credit Facility [Line Items]
Percentage of increase in sales				123.00%			73.00%
United States | E-Commerce
Line of Credit Facility [Line Items]
Percentage of increase in sales				122.00%			67.00%
United Kingdom | E-Commerce
Line of Credit Facility [Line Items]
Percentage of increase in sales				93.00%			53.00%
Minimum
Line of Credit Facility [Line Items]
Fixed charge coverage ratio	0.75						2.0
Maximum
Line of Credit Facility [Line Items]
Leverage ratio	4.50						3.50
COVID-19 | Minimum
Line of Credit Facility [Line Items]
Percentage of retail store closures		75.00%
COVID-19 | Maximum
Line of Credit Facility [Line Items]
Percentage of retail store closures		80.00%
Forecast | Revolving Credit Facility
Line of Credit Facility [Line Items]
Change in facility fee (percent)								0.05%
Forecast | Line of Credit | Revolving Credit Facility
Line of Credit Facility [Line Items]
Change in interest rate (percent)			0.20%			0.30%
Forecast | Senior Notes | Revolving Credit Facility | Senior Notes Due 2026 and 2042
Line of Credit Facility [Line Items]
Change in coupon rate (percent)								0.25%