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Shareholders' Equity - Summary of Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Parenthetical) (Details) - USD ($)
$ in Millions
3 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Equity [Abstract]    
Other comprehensive income (loss) recognized during the period, tax (expense) benefit $ (0.2) $ 0.3
Other comprehensive loss recognized during the period, tax benefit $ (0.2) $ 1.1