Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Mar. 31, 2018	Dec. 30, 2017	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017	Sep. 29, 2018
Income Tax Contingency [Line Items]
Newly enacted U.S. federal tax rate		21.00%
Net charge to income tax provision due to new tax regulations		$ 41.7
Component of net charge to income tax provision due to new tax regulations-estimated repatriation tax charge		48.7
Component of net charge to income tax provision due to new tax regulations-previously recorded DTL		20.3
Component of net charge to income tax provision due to new tax regulations-estimated deferred tax remeasurement charge		$ 13.3
Tax rate for global intangible low taxed income		10.50%
Effective income tax rate (percent)	28.40%		30.70%	44.20%	32.60%
U.S. Federal statutory rate				24.50%	35.00%
New Accounting Pronouncement, Early Adoption, Effect
Income Tax Contingency [Line Items]
Decrease in income tax provision due to adoption of ASU No. 2016-9	$ 0.3			$ 12.8
Scenario, Forecast
Income Tax Contingency [Line Items]
Newly enacted U.S. federal tax rate						24.50%