Retirement Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Oct. 02, 2016
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 490	$ 855	$ 773
Interest cost	2,894	2,850	3,253
Actuarial loss	1,538	1,659	1,259
Amortization of unrecognized prior service cost	146	153	240
Net periodic benefit cost	5,068	5,517	5,525
Postretirement Health Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	955	1,003	1,263
Actuarial loss	(27)	162	219
Net periodic benefit cost	928	1,165	1,482
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,743	1,331	4,479
Interest cost	19,463	19,889	20,926
Expected return on plan assets	(28,210)	(28,142)	(21,756)
Actuarial loss	3,331	4,455	2,828
Net periodic benefit cost	$ (3,673)	$ (2,467)	$ 6,477