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Revenue Recognition, Contracts with Customers, Remaining Performance Obligations included in Contract Liability (Details) - USD ($)
$ in Millions
Jul. 31, 2021
Apr. 30, 2021
Remaining Performance Obligations [Abstract]    
Remaining performance obligations $ 436.8  
Sales return reserve recorded in contract liability 40.7 $ 38.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-01    
Remaining Performance Obligations [Abstract]    
Remaining performance obligations excluding sales return reserve $ 377.7  
Expected timing of satisfaction, period 12 months  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-08-01    
Remaining Performance Obligations [Abstract]    
Remaining performance obligations $ 18.4  
Expected timing of satisfaction, period