Debt (Tables)

12 Months Ended

Dec. 30, 2018

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 December 30, 2018 and December 31, 2017 are presented in the following table:

	As of December 30, 2018						As of December 31, 2017
$ in millions	Principal		Carrying Amount		Fair Value		Principal		Carrying Amount		Fair Value
Long-term debt	$	300.0	$	294.2	$	305.3	$	300.8	$	294.3	$	312.7