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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 29, 2019	Dec. 28, 2018	Sep. 28, 2018
Income Tax Disclosure [Abstract]
Provisional estimate of tax expense related to one time transition tax			$ 27.2
FTC, Valuation Allowance			$ 13.1
Change In Tax Rate, Valuation Allowance	$ 2.7	$ 9.5
Change In Tax Rate, Valuation Allowance, Expense (Benefit)	$ 0.9	$ 3.6