Debt (Senior Secured Credit Facility) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 24, 2012
Debt Instrument [Line Items]
Leverage ratio	4.09
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Expansion option under credit facility	50.0
Potential total commitment with expansion option	175.0
Letters of credit sublimit	25.0
Percentage of stock pledge of domestic subsidiaries	100.00%
Percentage of stock pledge of all first-tier foreign subsidiaries	65.00%
Letter Of Credit [Member]
Debt Instrument [Line Items]
Letters of credit outstanding	1.4
Swingline Loan [Member]
Debt Instrument [Line Items]
Swingline loans sublimit	25.0
Maximum [Member]
Debt Instrument [Line Items]
Leverage ratio	2.75
Minimum [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.25