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Stock-based Compensation (Tables)
 12 Months Ended
Apr. 24, 2021
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 24,
2021		April 25,
2020		April 27,
2019
Expected dividend yield4.4 %4.7 %4.5 %
Expected stock price volatility34.6 %26.8 %24.6 %
Risk-free interest rate0.4 %1.8 %2.9 %
Expected life (years)6.06.06.2
Weighted average grant date fair value per share$4.60 $3.37 $3.66 
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 25, 20202,433 $29.08 
Granted540 23.57 
Exercised(146)23.29 
Canceled(130)28.62 
Balance as of April 24, 20212,697 $28.31 $22,969 
Vested or expected to vest as of April 24, 20212,655 $28.39 $22,526 
Exercisable as of April 24, 20211,035 $36.14 $5,718 
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 25, 2020106 $32.71 
Granted33 24.66 
Vested(85)30.93 
Forfeitures— — 
Outstanding at April 24, 202154 $30.63 
The following is a summary of restricted stock unit activity:
Restricted Stock Units
SharesWeighted-
Average
Grant Date
Fair Value
Outstanding at April 25, 20201,216 $27.16 
Granted513 23.62 
Vested(418)27.82 
Forfeitures(70)24.24 
Outstanding at April 24, 20211,241 $25.65 
The following is a summary of performance unit award activity at target:
Performance Unit Awards
SharesWeighted-
Average
Grant Date
Fair Value
Outstanding at April 25, 2020362 $26.38 
Granted146 23.62 
Vested(133)25.30 
Forfeitures and cancellations(87)34.80 
Outstanding at April 24, 2021288 $22.94 
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 24,
2021		April 25,
2020		April 27,
2019
Expected dividend yield3.6 %5.1 %5.2 %
Expected stock price volatility51.7 %34.3 %38.6 %
Risk-free interest rate0.1 %1.6 %2.5 %
Expected life (years)0.60.60.6
Weighted average grant date fair value per share$8.77 $4.98 $5.21