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Stock-based Compensation (Tables)
 12 Months Ended
Apr. 30, 2022
Share-based Payment Arrangement [Abstract]  
Summary of Stock Options, Weighted Average Assumptions
The fair value of stock options granted was estimated as of the grant date using a Black-Scholes option-pricing model with the following assumptions:
Fiscal Year Ended
April 30,
2022		April 24,
2021		April 25,
2020
Expected dividend yield3.4 %4.4 %4.7 %
Expected stock price volatility38.1 %34.6 %26.8 %
Risk-free interest rate1.1 %0.4 %1.8 %
Expected life (years)6.06.06.0
Weighted average grant date fair value per share$7.97 $4.60 $3.37 
Summary of Stock Options
The following is a summary of stock option activity:
Number
of
Options		Weighted-
Average
Exercise
Price		Aggregate Intrinsic
Value
Balance as of April 24, 20212,697 $28.31 
Granted290 30.74 
Exercised(175)22.76 
Canceled(75)43.01 
Balance as of April 30, 20222,737 $28.52 $15,615 
Vested or expected to vest as of April 30, 20222,727 $28.53 $15,557 
Exercisable as of April 30, 20221,707 $30.39 $9,858 
Summary of Non-Vested Restricted Stock Awards and Performance Unit Awards The following is a summary of restricted stock award activity:
Restricted Stock Awards
SharesWeighted-
Average
Grant Date
Fair Value
Outstanding at April 24, 202154 $30.63 
Granted32 31.86 
Vested(53)30.45 
Forfeitures(6)33.29 
Outstanding at April 30, 202227 $31.86 
The following is a summary of restricted stock unit activity:
Restricted Stock Units
SharesWeighted-
Average
Grant Date
Fair Value
Outstanding at April 24, 20211,241 $25.65 
Granted417 30.79 
Vested(586)26.42 
Forfeitures(70)26.92 
Outstanding at April 30, 20221,002 $27.24 
The following is a summary of performance unit award activity at target:
Performance Unit Awards
SharesWeighted-
Average
Grant Date
Fair Value
Outstanding at April 24, 2021288 $22.94 
Granted150 29.67 
Vested— — 
Forfeitures and cancellations— — 
Outstanding at April 30, 2022438 $26.14 
Summary of Weighted-Average Assumptions Under ESPP and CAP We estimate the grant date fair value of shares purchased under our ESPP using the Black-Scholes option pricing valuation model with the following assumptions:
Fiscal Year Ended
April 30,
2022		April 24,
2021		April 25,
2020
Expected dividend yield3.6 %3.6 %5.1 %
Expected stock price volatility28.6 %51.7 %34.3 %
Risk-free interest rate0.3 %0.1 %1.6 %
Expected life (years)0.60.60.6
Weighted average grant date fair value per share$6.79 $8.77 $4.98