Goodwill and Intangible Assets (Schedule of Intangible Assets Excluding Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 28, 2012	Sep. 27, 2013
Intangible Assets Excluding Goodwill [Line Items]
Intangible Assets Gross Excluding Goodwill	$ 175.7	$ 175.3
Intangible Assets Excluding Goodwill Accumulated Amortization	81.7	110.5
Intangible Assets, Net (Excluding Goodwill)	94.0	64.8
Customer Relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Amortized Intangible Assets, Weighted Average Useful Life	2 years 11 months
Intangible Assets, Gross Carrying Amount	78.7	78.7
Amortized Intangible Assets, Accumulated Amortization	36.2	49.3
Intangible Assets, Net Carrying Amount	42.5	29.4
Developed Technology and Other [Member]
Intangible Assets Excluding Goodwill [Line Items]
Amortized Intangible Assets, Weighted Average Useful Life	3 years 1 month
Intangible Assets, Gross Carrying Amount	89.3	88.9
Amortized Intangible Assets, Accumulated Amortization	42.3	55.3
Intangible Assets, Net Carrying Amount	47.0	33.6
In-Process Research and Development [Member]
Intangible Assets Excluding Goodwill [Line Items]
Amortized Intangible Assets, Weighted Average Useful Life	8 months
Intangible Assets, Gross Carrying Amount	6.1	6.1
Amortized Intangible Assets, Accumulated Amortization	3.2	5.9
Intangible Assets, Net Carrying Amount	2.9	0.2
Trademarks [Member]
Intangible Assets Excluding Goodwill [Line Items]
Indefinite-Lived Trademarks	1.6	1.6
Indefinite-lived Intangible Assets	$ 1.6	$ 1.6