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Debt - Fair Value of Long-term Debt (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 27, 2016
Dec. 27, 2015
Debt Disclosure [Abstract]    
Principal $ 452.5 $ 452.7
Carrying Amount 445.4 445.1
Fair Value 359.5 $ 315.2
Net unamortized original issue discount 3.1  
Debt issuance cost $ 4.0