Income Taxes (Income Tax Expense Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Sep. 28, 2012
Income Tax Disclosure [Abstract]
Tax expense at United States statutory rate	$ 197.8	$ 120.6	$ 89.2
Foreign tax rate difference	(77.3)	(49.8)	(44.7)
Deemed dividend from foreign subsidiary	0	0	2.4
Research and development credits	(2.8)	(16.3)	(1.7)
Change in tax reserve	11.0	11.7	10.4
Change in valuation allowance	9.8	4.1	3.9
Domestic production activities deduction	(10.9)	(5.0)	(3.9)
Audit settlement and adjustment	(19.7)	1.9	0
Other, net	(0.4)	(0.8)	(2.7)
Provision for income taxes	$ 107.5	$ 66.4	$ 52.9