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Related Party Transactions (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended 9 Months Ended
Jun. 29, 2012
Jun. 29, 2012
Common Class A [Member]
Jun. 29, 2012
Common Class A [Member]
Stock options [Member]
Jun. 29, 2012
Class L common stock [Member]
Jun. 29, 2012
Mindspeed [Member]
Sep. 30, 2011
Mindspeed [Member]
Related Party Transactions (Textual) [Abstract]            
Warrant to purchase shares 6,100,000       6,100,000  
Share purchase cost of Class L Common Stock       $ 0.6    
Stock options award granted and outstanding   12,300,000 12,720,000      
Amount due to or receivable from mindspeed         $ 0 $ 0
Related Party Transactions (Additional Textual) [Abstract]            
Warrant issuance term 2013-06          
Warrant exercise price 16.74