Retirement Plans (Determining the Present Values of Benefit Obligations and Net Periodic Benefit Costs) (Details) - employee	3 Months Ended		4 Months Ended	12 Months Ended
	Jul. 05, 2020	Apr. 12, 2020	Jan. 19, 2020	Oct. 02, 2022	Oct. 03, 2021	Sep. 27, 2020
SERP
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, Discount rate				5.80%	2.99%	2.84%
Assumptions used to determine net periodic benefit cost, Discount rate				2.99%	2.84%	3.24%
Assumptions used to determine net periodic benefit cost, Rate of future pay increases						3.50%
Number of active employees					0	0
Postretirement Health Plans
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, Discount rate				5.82%	2.95%	2.77%
Assumptions used to determine net periodic benefit cost, Discount rate				2.95%	2.77%	3.24%
Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, Discount rate				5.63%	3.11%	3.10%
Assumptions used to determine net periodic benefit cost, Discount rate	3.13%	3.38%	3.61%	3.11%	3.10%	3.36%
Assumptions used to determine net periodic benefit cost, Long-term rate of return on assets	5.40%	5.20%	5.90%	4.50%	5.40%	5.80%