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Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($)
Sep. 25, 2021
Sep. 26, 2020
Property, Plant and Equipment [Line Items]    
Total $ 2,893,188,968 $ 2,816,875,321
Less accumulated depreciation and amortization 1,522,419,536 1,462,385,631
Property and equipment - net 1,370,769,432 1,354,489,690
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total 399,747,689 387,561,951
Construction In Progress [Member]    
Property, Plant and Equipment [Line Items]    
Total 37,735,207 16,977,941
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Total 1,304,896,586 1,277,299,029
Store, Office And Warehouse Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total 1,018,790,068 991,978,611
Transportation Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total 71,032,666 82,665,722
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total $ 60,986,752 $ 60,392,067