Debt (Tables)

3 Months Ended

Mar. 27, 2016

Debt Disclosure [Abstract]

Fair Value of Long-Term Debt

Carrying amounts and the related estimated fair values of the Company’s long-term debt financial instruments not measured at fair value on a recurring basis at March 27, 2016 and December 27, 2015 are presented in the following table:

	As of March 27, 2016						As of December 27, 2015
$ in millions	Principal		Carrying Amount		Fair Value		Principal		Carrying Amount		Fair Value
Total long-term debt including current portion	$	452.5	$	445.4	$	359.5	$	452.7	$	445.1	$	315.2