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Basis Of Presentation and Significant Accounting Policies (Details) - USD ($)
$ in Millions
6 Months Ended
Apr. 01, 2017
Oct. 01, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Noncash Transaction, Value of SERP Assets Transferred to New Trustee $ 10.3  
Fair value of long-term debt 174.0 $ 176.4
Long-term Debt $ 175.0 $ 175.0