Revenue Recognition, Contracts with Customers, Remaining Performance Obligations included in Contract Liability (Details) $ in Millions	Apr. 30, 2021 USD ($)
Remaining Performance Obligations [Abstract]
Remaining performance obligations	$ 565.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-05-01
Remaining Performance Obligations [Abstract]
Remaining performance obligations excluding sales return reserve	$ 507.4
Expected timing of satisfaction, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-05-01
Remaining Performance Obligations [Abstract]
Remaining performance obligations excluding sales return reserve	$ 19.6
Expected timing of satisfaction, period