Debt (Tables)

6 Months Ended

Jun. 30, 2013

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, 2012 and June 30, 2013 are presented in the following table:

	As of December 30, 2012						As of June 30, 2013
$ in millions	Principal		Carrying Amount		Fair Value		Principal		Carrying Amount		Fair Value
Total Long-term debt including current portion	$	630.7	$	649.4	$	690.5	$	630.3	$	646.9	$	676.2