Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Deferred tax benefit from remeasurement of deferred taxes		$ 45.4
Transition tax		$ 0.1
Adjustment to deferred taxes	$ 0.5