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Basis of Presentation Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 27, 2015
Aug. 01, 2015
Jul. 02, 2015
Sep. 27, 2014
Senior Notes        
Subsequent Event [Line Items]        
Long Term Debt Obligations Without Convertible Notes $ 1,000.0 $ 1,000.0   $ 1,000.0
2022 Notes [Member]        
Subsequent Event [Line Items]        
Long Term Debt Obligations Without Convertible Notes $ 1,000.0   $ 1,000.0  
Senior Notes        
Subsequent Event [Line Items]        
Debt Instrument, Interest Rate During Period 6.25%      
2022 Notes [Member]        
Subsequent Event [Line Items]        
Debt Instrument, Interest Rate During Period 5.25%