Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016
Accounting Policies [Line Items]
Weeks in fiscal year	364 days	364 days	364 days
Maturity number of days	90 days
Capital Expenditures Incurred but Not yet Paid	$ 94.1
Minimum Useful Life [Member] | Building and Building Improvements [Member]
Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Maximum Useful Life [Member] | Building and Building Improvements [Member]
Accounting Policies [Line Items]
Property, plant and equipment, useful life	30 years
Minimum Useful Life [Member] | Machinery and Equipment [Member]
Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Maximum Useful Life [Member] | Machinery and Equipment [Member]
Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Allowance for Sales Returns [Member]
Accounting Policies [Line Items]
Sales Returns and Allowances, Goods	$ 32.2	$ 14.7