Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Carrying Amounts and Estimated 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 31, 2019 and December 30, 2018 are presented in the following table:

	As of March 31, 2019						As of December 30, 2018
$ in millions	Principal		Carrying Amount		Fair Value		Principal		Carrying Amount		Fair Value
Total long-term debt including current portion	$	300.0	$	294.4	$	316.1	$	300.0	$	294.2	$	305.3