Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance, shares at Oct. 01, 2017		81,843,483
Balance at Oct. 01, 2017	$ (388,130)	$ 818	$ 453,432	$ 1,485,820	$ (137,761)	$ (2,190,439)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit (in shares)		218,178
Shares issued under stock plans, including tax benefit	8,207	$ 3	8,204
Share-based compensation	9,017		9,017
Dividends declared	(45,514)		173	(45,687)
Purchases of treasury stock	(340,000)					(340,000)
Net earnings	121,371			121,371
Foreign currency translation adjustment	80				80
Effect of interest rate swaps, net	16,499				16,499
Effect of actuarial gains (losses) and prior service cost, net	26,922				26,922
Other	(151)		0	(151)
Balance, shares at Sep. 30, 2018		82,061,661
Balance at Sep. 30, 2018	(591,699)	$ 821	470,826	1,561,353	(94,260)	(2,530,439)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit (in shares)		97,341
Shares issued under stock plans, including tax benefit	1,232	$ 1	1,231
Share-based compensation	8,074		8,074
Dividends declared	(41,235)		191	(41,426)
Purchases of treasury stock	(125,317)					(125,317)
Net earnings	94,437			94,437
Effect of interest rate swaps, net	(2,462)				(2,462)
Effect of actuarial gains (losses) and prior service cost, net	(43,284)				(43,284)
Balance, shares at Sep. 29, 2019		82,159,002
Balance at Sep. 29, 2019	(737,584)	$ 822	480,322	1,577,034	(140,006)	(2,655,756)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under stock plans, including tax benefit (in shares)		210,712
Shares issued under stock plans, including tax benefit	4,647	$ 2	4,645
Share-based compensation	4,394		4,394
Dividends declared	(27,563)		154	(27,717)
Purchases of treasury stock	(153,550)					(153,550)
Net earnings	89,764			89,764
Effect of actuarial gains (losses) and prior service cost, net	29,401				29,401
Balance, shares at Sep. 27, 2020		82,369,714
Balance at Sep. 27, 2020	$ (793,361)	$ 824	$ 489,515	$ 1,636,211	$ (110,605)	$ (2,809,306)