Debt (Senior Secured Notes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 25, 2012
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Percentage of stock pledge of domestic subsidiaries	100.00%
Percentage of stock pledge of all first-tier foreign subsidiaries	65.00%
High [Member] | Shelf Notes [Member]
Debt Instrument [Line Items]
Fixed rate senior secured note	$ 50.0
Maximum [Member] | Senior Secured Notes [Member]
Debt Instrument [Line Items]
Leverage ratio	2.75
Minimum [Member] | Senior Secured Notes [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.25