Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 01, 2016	Jan. 02, 2015
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	35.00%	35.00%
Accrued income taxes, current	$ 26.5
Tax Adjustments, Settlements, and Unusual Provisions	2.6
Benefit To Tax Expense Resulting From Reversal of Uncertain Tax Positions from Audit Settlement	24.0
Research and experimentation tax credits	$ 10.2	$ 7.0