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Major Supplier (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 25, 2010
Major Supplier (Textual) [Abstract]
Purchases from distributor	$ 201.3	$ 273.9	$ 269.4
Due to distributors current	0.1	10.4
Sales to distributor	39.4	42.2	37.6
Due from distributor Current	$ 1.7	$ 1.9
Class A Common Stock [Member]
Major Supplier (Textual) [Abstract]
Percentage of common stock owns by distributor	2.00%
Class B Common Stock [Member]
Major Supplier (Textual) [Abstract]
Percentage of common stock owns by distributor	1.00%

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Due from distributor current.

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Due to distributors current.

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Percentage of common stock owns by distributor.

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Purchases from distributor.

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