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Stockholders' Equity, Valuation Assumptions used for Options Granted (Details) - Stock Options [Member] - 2015 Plan [Member]
12 Months Ended
Oct. 02, 2021
Sep. 26, 2020
Sep. 28, 2019
Equity Incentive Plans [Abstract]      
Period after date of grant before vesting commences 1 year    
Expiration term 10 years    
Weighted Average Assumptions [Abstract]      
Risk-free interest rate 0.50% 1.70% 2.50%
Dividend yield 0.00% 0.00% 0.00%
Volatility factor 30.40% 27.20% 26.30%
Expected option life 6 years 6 years 6 months 6 years 6 months
Minimum [Member]      
Equity Incentive Plans [Abstract]      
Vesting period 4 years    
Maximum [Member]      
Equity Incentive Plans [Abstract]      
Vesting period 5 years