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Debt Debt (Summary of long-term debt maturities) (Details) - USD ($)
$ in Millions
Jun. 26, 2016
Sep. 27, 2015
Debt Disclosure [Abstract]    
2016 $ 0.0  
2017 400.0  
2018 0.0  
2019 350.0  
2020 0.0  
Thereafter 2,850.0  
Total $ 3,600.0 $ 2,350.0