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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Earnings Per Share ("EPS")) (Narrative) (Details) - shares
12 Months Ended
Sep. 27, 2019
Sep. 28, 2018
Sep. 29, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Percentage of cash dividends on Class A common stock relative to Class B common stock 110.00%    
Stock Options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive securities excluded from EPS (shares) 0 0 0
Non-vested Stock      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive securities excluded from EPS (shares) 43,963 46,776 95,068