Debt (Debt Covenant Compliance) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 24, 2012	Dec. 25, 2011
Leverage Ratio	4.09
Cash balance threshold for repayment	65
Debt Covenant Compliance February 2012 [Member]
Leverage Ratio		2.75
Adjusted leverage ratio Q1 2012	3.00
Adjusted leverage ratio Q2 2012	3.35
Adjusted leverage ratio Q3 2012	3.25
Debt Covenant Compliance July 2012 [Member]
Debt instrument, basis spread on variable rate	100.00%
Debt instrument, description of variable rate basis	a daily rate equal to the one-month LIBOR rate, plus 1.00%
Adjusted leverage ratio Q2 2012	5.25
Adjusted leverage ratio Q3 2012	6.50
Adjusted leverage ratio Q4 2012	5.50
Adjusted leverage ratio Q1 2013	3.50
Adjusted leverage ratio Q2 2013	2.75
Cash restructuring excluded from EBITDA calculation	25.0
Fixed charge covenant Q4 2012	1.00
Senior Secured Credit Facility [Member] | Debt Covenant Compliance July 2012 [Member]
Debt instrument, basis spread on variable rate	0.50%
Amended total commitment	75.0
Series A Senior Secured Notes [Member] | Debt Covenant Compliance July 2012 [Member]
Interest rate	5.75%
Series B Senior Secured Notes [Member] | Debt Covenant Compliance July 2012 [Member]
Interest rate	6.13%
Series C Senior Secured Notes [Member] | Debt Covenant Compliance July 2012 [Member]
Interest rate	6.50%
Maximum [Member]
Leverage Ratio	2.75
Maximum [Member] | Senior Secured Notes [Member]
Leverage Ratio	2.75
Maximum [Member] | Senior Secured Credit Facility [Member] | Debt Covenant Compliance July 2012 [Member]
Line of credit facility, unused capacity, commitment fee percentage	1.00%
Maximum [Member] | Senior Secured Credit Facility [Member] | Debt Covenant Compliance July 2012, Base Rate [Member]
Debt instrument, basis spread on variable rate	4.25%
Maximum [Member] | Senior Secured Credit Facility [Member] | Debt Covenant Compliance July 2012, LIBOR Rate [Member]
Debt instrument, basis spread on variable rate	5.25%