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Employee Benefit Plans (Weighted Average Assumptions Used To Determine The Defined Benefit Retirement Plan Obligation) (Details)
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Compensation and Retirement Disclosure [Abstract]    
Discount rate 1.99% 1.28%
Expected rate of return on plan assets 5.50% 5.50%
Expected rate of increase in future compensation levels 3.00% 3.00%