Provision For Restructuring (Schedule Of Restructuring Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Restructuring Cost and Reserve [Line Items]
Asset impairments	$ 7,843
Total	28,640	8,211	5,401
Global Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	11,115
Asset impairments	7,761
Other exit costs	519
SG&A Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	7,015	6,993	2,828
Asset impairments	72
Other exit costs	2,203
Manufacturing Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	(146)	641	1,481
Other exit costs	101	577
2005 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges			1,149
Other exit costs			$ (57)