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Earnings Per Common Share (Narrative) (Details)
 3 Months Ended
Dec. 25, 2021
item
Earnings Per Share [Line Items]  
Number of classes of common stock 2
Conversion feature for Class B Common Stock each share is convertible into one share of Class A Common Stock at any time
Voting rights for shareholders Each share of Class A Common Stock has one vote per share and each share of Class B Common Stock has ten votes per share
Percentage of cash dividend on Class B Common Stock entitled to receive for each share of Class A Common Stock 110.00%
Class A Common Stock  
Earnings Per Share [Line Items]  
Number of votes for common stock 1
Class B Common Stock  
Earnings Per Share [Line Items]  
Number of votes for common stock 10