Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Apr. 01, 2018	Dec. 31, 2017	Jul. 02, 2017	Apr. 02, 2017	Apr. 01, 2018	Apr. 02, 2017	Sep. 30, 2018	Oct. 01, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effective tax rate (as a percent)					11.00%	30.40%
Deferred tax benefit from tax reform remeasurement		$ 10.1
Effective income tax rate excluding revaluation of deferred taxes (as a percent)					23.00%
Tax benefit recognized in connection with the IRS examination				$ 1.2
Payments made to tax authorities			$ 20.0
Effective income tax rate excluding excess tax benefit and TCJA impacts (as a percent)					28.50%	32.50%
Liability for uncertain tax positions	$ 6.3				$ 6.3			$ 6.0
Period during which unrecognized tax benefits would affect the effective tax rate					12 months
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefit	$ 1.4			0.9	$ 4.6	$ 2.7
Scenario, Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Statutory federal tax rate							24.50%
Foreign Tax Authority
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reserve for uncertain tax position in connection with IRS examination				$ 2.3