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Stock-Based Compensation - Weighted-Average Assumptions Utilized to Value Stock Options (Detail) - USD ($)
3 Months Ended 6 Months Ended
Mar. 26, 2022
Mar. 27, 2021
Mar. 26, 2022
Mar. 27, 2021
Share-based Payment Arrangement [Abstract]        
Risk-free interest rate 1.10% 0.40% 1.10% 0.40%
Expected volatility 34.20% 35.00% 34.20% 35.00%
Expected life (in years) 4 years 9 months 18 days 4 years 9 months 18 days 4 years 9 months 18 days 4 years 9 months 18 days
Dividend yield $ 0 $ 0 $ 0 $ 0
Weighted average fair value of options granted $ 20.80 $ 21.17 $ 21.02 $ 20.08