Employee Benefit Plans and Collective Bargaining Agreements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Employee Benefit Plans and Collective Bargaining Agreements [Abstract]
Defined contribution plan, contribution amount	$ 11.6	$ 11.5	$ 10.7
Net actuarial pension loss to be recognized as a component of net periodic benefit cost	95.0
Prior service cost to be recognized as a component of net periodic benefit cost	11.3
Pending transactions not included in fair value measurements	(19.6)	(28.2)
Amounts that are expected to be recognized as net periodic benefit cost	94.0
Multiemployer plan, withdrawal obligation	6.6
Multi-employer pension plan installment amount	$ 0.3