Summary Of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 29, 2018	Jun. 29, 2018
Accounting Policies [Abstract]
Excess tax benefit	$ 0.5	$ 9.9

Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount

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