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Pensions And Other Postretirement Benefits (Weighted Average Assumptions) (Details)
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate to determine net periodic benefit cost 3.39% 3.09% 3.54%
Discount rate to determine benefit obligations 4.11% 3.39% 3.09%
Funded Plan [Member] | Qualified Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate to determine net periodic benefit cost 3.85% 3.72% 4.47%
Discount rate to determine benefit obligations 4.26% 3.85% 3.72%
Expected return on plan assets 4.20% 4.21% 4.15%
Unfunded Plan [Member] | Nonqualified Plan [Member] | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate to determine net periodic benefit cost 3.88% 3.77% 4.41%
Discount rate to determine benefit obligations 4.31% 3.88% 3.77%
Rate of compensation increase 2.53% 2.44% 2.46%