Pension and Postretirement Benefit Plans Narrative (Details) (USD $)	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013 Pension Plans	Mar. 31, 2012 Pension Plans	Dec. 29, 2012 Canadian Plans pension_plan	Mar. 30, 2013 Canadian Plans Special Charges Net	Dec. 29, 2012 Other Current Assets Canadian Plans
Defined Benefit Plan Disclosure [Line Items]
Number of liquidated pension plans					2
Current assets							$ 0
Curtailment / settlement (gain) loss			0	0		800,000
Contributions by employer			1,700,000
Employer contributions in 2013			5,300,000
Reclassed out of AOCI ($0.1 million for 3 months ended March 30, 2013 and less than $0.1 million in the three months ended March 31, 2012)	$ 100,000	$ 100,000