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Income Taxes - Schedule of Income before Income Taxes, Income Tax Expense and Effective Income Tax Rate (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Oct. 31, 2020
Oct. 26, 2019
Oct. 31, 2020
Oct. 26, 2019
Income Tax Disclosure [Abstract]        
Income before Income Taxes $ 46.2 $ 29.0 $ 61.8 $ 64.6
Income Tax Expense $ 7.6 $ 5.2 $ 2.5 $ 12.5
Effective Tax Rate 16.50% 17.90% 4.00% 19.30%