Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Operating lease rent expense	$ 26.6	$ 25.6	$ 26.4
Letter of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit	22.3
Damage from Fire, Explosion or Other Hazard [Member] | Pending Litigation [Member] | Environmental [Member]
Loss Contingencies [Line Items]
Environmental undiscounted liability	$ 2.0	$ 2.1