Commitments and Contingencies Narrative (Details) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Letter of Credit [Member]
Loss Contingencies [Line Items]
Short-term Debt	$ 22.4
Damage from Fire, Explosion or Other Hazard [Member] | Pending Litigation [Member] | Environmental [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 2.1	$ 2.3