Debt (Tables)

9 Months Ended

Sep. 30, 2012

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 25, 2011 and September 30, 2012 are presented in the following table:

	As of December 25, 2011						As of September 30, 2012
$ in millions	Principal		Carrying Amount		Fair Value		Principal		Carrying Amount		Fair Value
Long-term debt	$	631.8	$	654.6	$	642.7	$	631.0	$	650.7	$	678.2