Provision For Restructuring (Schedule Of Restructuring Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 6,654	$ 10,866	$ 28,438
Profit Enhancement Plan
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	5,181	0	0
Other exit costs	101	0	0
Restructuring expense	5,300
Global Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	976	7,421	16,945
Asset impairments	172	1,210	6,506
Other exit costs	231	2,389	5,084
Restructuring expense	1,400
SG&A Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Severance and other employee-related charges	(7)	(222)	(86)
Other exit costs	0	68	64
Restructuring expense	(7)
Manufacturing Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Other exit costs	$ 0	$ 0	$ (75)