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Fair Value Measurements - Narrative (Details) - Interest rate swap agreements - USD ($)
$ in Millions
3 Months Ended
Jul. 31, 2022
Jul. 31, 2021
Feb. 28, 2019
Fair Value Measurements      
Change in fair value of financial instruments $ (1.3) $ (2.2)  
Other accrued expenses and current liabilities      
Fair Value Measurements      
Expected amount of pre-tax net losses will be reclassified from accumulated other comprehensive income (loss) into earnings during the next twelve months $ 1.8    
Term Loan Facility      
Fair Value Measurements      
Notional amount     $ 500.0
Term Loan Facility | LIBOR      
Fair Value Measurements      
Fixed interest rate     2.46%