Segment Information (Operations by Lines of Business) (Details) - USD ($)	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	$ 5,334,032,609	$ 5,639,609,434	$ 5,892,781,732
Merchandise costs (4)	4,059,892,018	4,339,774,157	4,487,866,518
Depreciation And Amortization	122,890,499	121,622,579	115,979,172
Impairment loss (6)	34,900,000
Income from operations	117,579,855	147,144,231	292,304,132
Other operating income	17,044,000	16,159,000	21,084,000
Other income	12,068,052	14,216,870	8,269,117
Interest expense	19,710,406	21,859,800	22,068,290
Income tax expense	26,345,000	33,960,000	67,693,000
Net income	83,592,501	105,541,301	210,811,959
Operating Segments [Member] | Retail Grocery [Member]
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	5,127,642,000	5,421,791,000	5,663,936,000
Merchandise costs (4)	3,913,286,000	4,151,150,000	4,325,262,000
Salary and wages	578,132,000	590,921,000	577,319,000
Insurance costs	56,515,000	54,875,000	39,311,000
Repairs and maintenance costs	91,761,000	81,136,000	78,416,000
Bank charges	60,019,000	62,164,000	61,712,000
Depreciation And Amortization	94,242,000	93,384,000	90,391,000
Utilities	61,466,000	63,819,000	61,344,000
Other retail grocery expenses (5)	171,685,000	158,400,000	158,961,000
Impairment loss (6)		34,957,000
Income from operations	100,536,000	130,986,000	271,220,000
Operating Segments [Member] | Retail Grocery [Member] | Grocery [Member]
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	1,934,445,000	1,983,198,000	2,062,416,000
Operating Segments [Member] | Retail Grocery [Member] | Non-foods [Member]
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	1,167,586,000	1,273,324,000	1,326,907,000
Operating Segments [Member] | Retail Grocery [Member] | Perishables [Member]
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	1,404,687,000	1,441,039,000	1,482,089,000
Operating Segments [Member] | Retail Grocery [Member] | Fuel [Member]
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	620,924,000	724,230,000	792,524,000
All Other [Member]
Segment Reporting Information [Line Items]
Total revenues from unaffiliated customers	$ 206,391,000	$ 217,818,000	$ 228,846,000