Debt (Tables)

6 Months Ended

Jun. 25, 2017

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 June 25, 2017 and December 25, 2016 are presented in the following table:

	As of June 25, 2017						As of December 25, 2016
$ in millions	Principal		Carrying Amount		Fair Value		Principal		Carrying Amount		Fair Value
Total long-term debt including current portion	$	374.1	$	370.5	$	382.0	$	437.3	$	432.0	$	423.6