Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Stock Employee Compensation Trust (SECT)	Supplemental Retirement Plan (SERP) Trust	Accumulated Other Comprehensive (Loss) Income	Class A Common Stock	Class A Common Stock Treasury Stock	Class A Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock	Class B Common Stock Treasury Stock	Class B Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock Supplemental Retirement Plan (SERP) Trust
Beginning of year at Oct. 01, 2022		$ 51,280	$ 516,123	$ 2,321,558	$ (1,047,012)	$ (73,602)	$ (58,989)	$ (311,042)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			7,852		16,107
Equity-based compensation expense			8,119
Adjustment to market - SECT and SERP			76,176
Net earnings	$ 175,156			175,156
Dividends (1)				(34,074)
Class A and B shares purchased					(27,033)
Issuance of shares - SECT						15,713
Purchase of shares - SECT	(14,251)					(14,841)
Adjustment to market						(42,039)	(34,137)
Other comprehensive income (loss)	56,442							56,442
End of year at Sep. 30, 2023	$ 1,601,757	51,280	608,270	2,462,640	(1,057,938)	(114,769)	(93,126)	(254,600)
Beginning of year - Common stock at Oct. 01, 2022									43,806,835			7,472,878
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class B to Class A									15,509			(15,509)
End of year - Common stock at Sep. 30, 2023									43,822,344			7,457,369
Beginning of year - Shares at Oct. 01, 2022										(14,614,444)	(425,148)		(3,020,291)	(611,942)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to equity compensation, shares										50,057			336,451
Shares purchased, shares										(93,510)			(213,005)
Issuance of shares - SECT, shares														168,519
Purchase of shares - SECT, shares														(148,705)
End of year - Shares at Sep. 30, 2023										(14,657,897)	(425,148)		(2,896,845)	(592,128)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.07
Issuance of shares			2,160		995
Equity-based compensation expense			3,454
Adjustment to market - SECT and SERP			59,377
Net earnings	$ 52,635			52,635
Dividends (1)				(8,619)
Class A and B shares purchased					(8,711)
Issuance of shares - SECT						5,001
Purchase of shares - SECT	(4,561)					(3,971)
Adjustment to market						(32,634)	(26,743)
Other comprehensive income (loss)	33,040							33,040
End of year at Dec. 30, 2023	1,677,741	51,280	673,261	2,506,656	(1,065,654)	(146,373)	(119,869)	(221,560)
Beginning of year at Sep. 30, 2023	1,601,757	51,280	608,270	2,462,640	(1,057,938)	(114,769)	(93,126)	(254,600)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			6,286		6,618
Equity-based compensation expense			5,636
Adjustment to market - SECT and SERP			82,080
Net earnings	107,141			107,141
Dividends (1)				(17,572)
Class A and B shares purchased					(20,238)
Issuance of shares - SECT						15,788
Purchase of shares - SECT	(9,407)					(8,817)
Adjustment to market						(45,497)	(36,583)
Other comprehensive income (loss)	21,681							21,681
End of year at Mar. 30, 2024	1,718,280	51,280	702,272	2,552,209	(1,071,558)	(153,295)	(129,709)	(232,919)
Beginning of year - Common stock at Sep. 30, 2023									43,822,344			7,457,369
Beginning of year - Shares at Sep. 30, 2023										(14,657,897)	(425,148)		(2,896,845)	(592,128)	(826,170)
Beginning of year at Sep. 30, 2023	1,601,757	51,280	608,270	2,462,640	(1,057,938)	(114,769)	(93,126)	(254,600)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			6,159		6,743
Equity-based compensation expense			8,952
Adjustment to market - SECT and SERP			103,275
Net earnings	166,252			166,252
Dividends (1)				(26,521)
Class A and B shares purchased					(21,832)
Issuance of shares - SECT						16,670
Purchase of shares - SECT	(14,296)					(13,706)
Adjustment to market						(55,952)	(47,323)
Other comprehensive income (loss)	17,085							17,085
End of year at Jun. 29, 2024	1,761,559	51,280	726,656	2,602,371	(1,073,027)	(167,757)	(140,449)	(237,515)
Beginning of year - Common stock at Sep. 30, 2023									43,822,344			7,457,369
Beginning of year - Shares at Sep. 30, 2023										(14,657,897)	(425,148)		(2,896,845)	(592,128)	(826,170)
Beginning of year at Sep. 30, 2023	1,601,757	51,280	608,270	2,462,640	(1,057,938)	(114,769)	(93,126)	(254,600)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			8,572		12,436
Equity-based compensation expense			11,737
Adjustment to market - SECT and SERP			155,930
Net earnings	208,786			208,786
Dividends (1)				(35,476)
Class A and B shares purchased					(36,738)
Issuance of shares - SECT						28,202
Purchase of shares - SECT	(22,837)					(22,247)
Adjustment to market						(85,235)	(70,695)
Other comprehensive income (loss)	51,788							51,788
End of year at Sep. 28, 2024	$ 1,828,817	51,280	784,509	2,635,950	(1,082,240)	(194,049)	(163,821)	(202,812)
Beginning of year - Common stock at Sep. 30, 2023									43,822,344			7,457,369
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class B to Class A									12,805			(12,805)
End of year - Common stock at Sep. 28, 2024									43,835,149			7,444,564
Beginning of year - Shares at Sep. 30, 2023										(14,657,897)	(425,148)		(2,896,845)	(592,128)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to equity compensation, shares										44,658			254,853
Shares purchased, shares										(20,273)			(219,096)
Issuance of shares - SECT, shares														183,403
Purchase of shares - SECT, shares														(139,359)
End of year - Shares at Sep. 28, 2024										(14,633,512)	(425,148)		(2,861,088)	(548,084)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.11
Beginning of year at Dec. 30, 2023	$ 1,677,741	51,280	673,261	2,506,656	(1,065,654)	(146,373)	(119,869)	(221,560)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			4,126		5,623
Equity-based compensation expense			2,182
Adjustment to market - SECT and SERP			22,703
Net earnings	54,506			54,506
Dividends (1)				(8,953)
Class A and B shares purchased					(11,527)
Issuance of shares - SECT						10,787
Purchase of shares - SECT						(4,846)
Adjustment to market						(12,863)	(9,840)
Other comprehensive income (loss)	(11,359)							(11,359)
End of year at Mar. 30, 2024	1,718,280	51,280	702,272	2,552,209	(1,071,558)	(153,295)	(129,709)	(232,919)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			(127)		125
Equity-based compensation expense			3,316
Adjustment to market - SECT and SERP			21,195
Net earnings	59,111			59,111
Dividends (1)				(8,949)
Class A and B shares purchased					(1,594)
Issuance of shares - SECT						882
Purchase of shares - SECT						(4,889)
Adjustment to market						(10,455)	(10,740)
Other comprehensive income (loss)	(4,596)							(4,596)
End of year at Jun. 29, 2024	1,761,559	51,280	726,656	2,602,371	(1,073,027)	(167,757)	(140,449)	(237,515)
Beginning of year at Sep. 28, 2024	1,828,817	51,280	784,509	2,635,950	(1,082,240)	(194,049)	(163,821)	(202,812)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			2,413		773
Equity-based compensation expense			3,346
Adjustment to market - SECT and SERP			(13,208)
Net earnings	57,526			57,526
Dividends (1)				(8,961)
Class A and B shares purchased					(59,775)
Issuance of shares - SECT						9,665
Purchase of shares - SECT	(8,087)					(8,087)
Adjustment to market						6,252	6,956
Other comprehensive income (loss)	(39,183)							(39,183)
End of year at Dec. 28, 2024	1,786,534	51,280	777,060	2,684,515	(1,141,242)	(186,219)	(156,865)	(241,995)
Beginning of year at Sep. 28, 2024	1,828,817	51,280	784,509	2,635,950	(1,082,240)	(194,049)	(163,821)	(202,812)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			8,550		5,563
Equity-based compensation expense			6,014
Adjustment to market - SECT and SERP			(48,954)
Net earnings	112,136			112,136
Dividends (1)				(18,106)
Class A and B shares purchased					(127,355)
Issuance of shares - SECT						19,289
Purchase of shares - SECT	(14,808)					(14,808)
Adjustment to market						26,623	22,331
Other comprehensive income (loss)	(14,060)							(14,060)
End of year at Mar. 29, 2025	1,806,040	51,280	750,119	2,729,980	(1,204,032)	(162,945)	(141,490)	(216,872)
Beginning of year - Common stock at Sep. 28, 2024									43,835,149			7,444,564
Beginning of year - Shares at Sep. 28, 2024										(14,633,512)	(425,148)		(2,861,088)	(548,084)	(826,170)
Beginning of year at Sep. 28, 2024	1,828,817	51,280	784,509	2,635,950	(1,082,240)	(194,049)	(163,821)	(202,812)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			11,585		5,673
Equity-based compensation expense			9,673
Adjustment to market - SECT and SERP			(35,832)
Net earnings	170,622			170,622
Dividends (1)				(27,247)
Class A and B shares purchased					(128,738)
Issuance of shares - SECT						20,287
Purchase of shares - SECT	(18,505)					(18,505)
Adjustment to market						19,053	16,779
Other comprehensive income (loss)	40,879							40,879
End of year at Jun. 28, 2025	1,913,046	51,280	769,935	2,779,325	(1,205,305)	(173,214)	(147,042)	(161,933)
Beginning of year - Common stock at Sep. 28, 2024									43,835,149			7,444,564
Beginning of year - Shares at Sep. 28, 2024										(14,633,512)	(425,148)		(2,861,088)	(548,084)	(826,170)
Beginning of year at Sep. 28, 2024	1,828,817	51,280	784,509	2,635,950	(1,082,240)	(194,049)	(163,821)	(202,812)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			30,614		15,537
Equity-based compensation expense			12,714
Adjustment to market - SECT and SERP			11,491
Net earnings	235,028			235,028
Dividends (1)				(36,430)
Class A and B shares purchased					(142,497)
Issuance of shares - SECT						32,664
Purchase of shares - SECT	(28,985)					(28,985)
Adjustment to market						(5,121)	(6,370)
Other comprehensive income (loss)	45,093							45,093
End of year at Sep. 27, 2025	$ 1,992,555	51,280	839,328	2,834,548	(1,209,200)	(195,491)	(170,191)	(157,719)
Beginning of year - Common stock at Sep. 28, 2024									43,835,149			7,444,564
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class B to Class A									28,309			(28,309)
End of year - Common stock at Sep. 27, 2025									43,863,458			7,416,255
Beginning of year - Shares at Sep. 28, 2024										(14,633,512)	(425,148)		(2,861,088)	(548,084)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to equity compensation, shares										136,092			245,499
Shares purchased, shares										(516,037)			(210,400)
Issuance of shares - SECT, shares														170,034
Purchase of shares - SECT, shares														(148,594)
End of year - Shares at Sep. 27, 2025										(15,013,457)	(425,148)		(2,825,989)	(526,644)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.15
Beginning of year at Dec. 28, 2024	$ 1,786,534	51,280	777,060	2,684,515	(1,141,242)	(186,219)	(156,865)	(241,995)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			6,137		4,790
Equity-based compensation expense			2,668
Adjustment to market - SECT and SERP			(35,746)
Net earnings	54,610			54,610
Dividends (1)				(9,145)
Class A and B shares purchased					(67,580)
Issuance of shares - SECT						9,624
Purchase of shares - SECT						(6,721)
Adjustment to market						20,371	15,375
Other comprehensive income (loss)	25,123							25,123
End of year at Mar. 29, 2025	1,806,040	51,280	750,119	2,729,980	(1,204,032)	(162,945)	(141,490)	(216,872)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			3,035		110
Equity-based compensation expense			3,659
Adjustment to market - SECT and SERP			13,122
Net earnings	58,486			58,486
Dividends (1)				(9,141)
Class A and B shares purchased					(1,383)
Issuance of shares - SECT						998
Purchase of shares - SECT						(3,697)
Adjustment to market						(7,570)	(5,552)
Other comprehensive income (loss)	54,939							54,939
End of year at Jun. 28, 2025	$ 1,913,046	$ 51,280	$ 769,935	$ 2,779,325	$ (1,205,305)	$ (173,214)	$ (147,042)	$ (161,933)