Basis Of Presentation Basis of Presentation (Impact of Change in Accounting Principle on Consolidated Condensed Statement of Earnings) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
New Accounting Pronouncements or Change in Accounting Principle
Other	$ 4,415	$ 7,168	$ 14,294	$ 14,645
Earnings (loss) before income taxes	(23,354)	60,018	105,081	170,417
Income taxes (benefit)	(10,764)	13,853	17,899	40,424
Net earnings (loss)	$ (12,590)	$ 46,165	$ 87,182	$ 129,993
Earnings (loss) per share - Basic	$ (0.39)	$ 1.32	$ 2.60	$ 3.73
Earnings (loss) per share - Diluted	$ (0.39)	$ 1.31	$ 2.59	$ 3.69
Retirement liability adjustment	$ 5,922	$ 5,564	$ 16,401	$ 17,660
Other comprehensive income (loss), net of tax	8,511	5,127	17,344	9,527
Comprehensive Income (Loss)	(4,079)	51,292	104,526	139,520
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle
Other		5,466		9,540
Earnings (loss) before income taxes		61,720		175,522
Income taxes (benefit)		14,255		41,629
Net earnings (loss)		$ 47,465		$ 133,893
Earnings (loss) per share - Basic		$ 1.36		$ 3.84
Earnings (loss) per share - Diluted		$ 1.35		$ 3.80
Retirement liability adjustment		$ 4,264		$ 13,760
Other comprehensive income (loss), net of tax		3,827		5,627
Comprehensive Income (Loss)		51,292		139,520
Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Other	2,876	1,702	8,627	5,105
Earnings (loss) before income taxes	(2,876)	(1,702)	(8,627)	(5,105)
Income taxes (benefit)	(679)	(402)	(2,036)	(1,205)
Net earnings (loss)	$ (2,197)	$ (1,300)	$ (6,591)	$ (3,900)
Earnings (loss) per share - Basic	$ (0.07)	$ (0.04)	$ (0.20)	$ (0.11)
Earnings (loss) per share - Diluted	$ (0.07)	$ (0.04)	$ (0.20)	$ (0.11)
Retirement liability adjustment	$ 2,197	$ 1,300	$ 6,591	$ 3,900
Other comprehensive income (loss), net of tax	2,197	1,300	6,591	3,900
Comprehensive Income (Loss)	0	$ 0	0	$ 0
Previous Accounting Guidance
New Accounting Pronouncements or Change in Accounting Principle
Other	7,291		22,921
Earnings (loss) before income taxes	(26,230)		96,454
Income taxes (benefit)	(11,443)		15,863
Net earnings (loss)	$ (14,787)		$ 80,591
Earnings (loss) per share - Basic	$ (0.46)		$ 2.40
Earnings (loss) per share - Diluted	$ (0.46)		$ 2.39
Retirement liability adjustment	$ 8,119		$ 22,992
Other comprehensive income (loss), net of tax	10,708		23,935
Comprehensive Income (Loss)	$ (4,079)		$ 104,526