Debt (Senior Secured Notes) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 25, 2011
Senior Secured Notes [Member] | Maximum [Member]
Leverage ratio	2.75
Senior Secured Notes [Member] | Minimum [Member]
Fixed charge coverage ratio	1.25
High [Member] | Shelf Notes [Member]
Additional fixed rate senior secured note	50.0
Senior Secured Notes [Member]
Percentage of stock pledge of domestic subsidiaries	100.00%
Percentage of stock pledge of all first-tier foreign subsidiaries	65.00%