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Stock-based Compensation - Summary of Weighted-Average Assumptions (Details) - $ / shares
12 Months Ended
Apr. 30, 2022
Apr. 24, 2021
Apr. 25, 2020
Director And Employee Stock Option Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected dividend yield 3.40% 4.40% 4.70%
Expected stock price volatility 38.10% 34.60% 26.80%
Risk-free interest rate 1.10% 0.40% 1.80%
Expected life (years) 6 years 6 years 6 years
Weighted average grant date fair value per share (in usd per share) $ 7.97 $ 4.60 $ 3.37
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected dividend yield 3.60% 3.60% 5.10%
Expected stock price volatility 28.60% 51.70% 34.30%
Risk-free interest rate 0.30% 0.10% 1.60%
Expected life (years) 7 months 6 days 7 months 6 days 7 months 6 days
Weighted average grant date fair value per share (in usd per share) $ 6.79 $ 8.77 $ 4.98