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Pension Plans (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Dec. 29, 2012
Pension and Other Postretirement Benefit Expense [Abstract]      
Defined benefit pension plans net actuarial loss amortized into periodic pension $ 4.0    
Defined benefit pension plans prior service cost amortized into periodic pension benefit cost 0.2    
Contribution to defined benefit pension plans 1.1 3.9 11.7
Expected additional contribution to defined benefit pension plans $ 3.1