Retirement Plans (Schedule Of Pension Benefit Payments Expected Future Service) (Details) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension and Other Postretirement Benefit Expense [Abstract]
Defined Benefit Plan, Service Cost	$ 2,500,000	$ 2,500,000	$ 2,100,000
Defined Benefit Plan, Interest Cost	7,900,000	7,900,000	6,900,000
Defined Benefit Plan, Expected Return on Plan Assets	(8,000,000)	(7,300,000)	(6,400,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)	3,600,000	3,200,000	2,400,000
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	(7,500,000)	(6,700,000)	(2,600,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	200,000	200,000	400,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments	0	(1,700,000)	0
Defined Benefit Plan, Net Periodic Benefit Cost	6,200,000	4,800,000	5,400,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax	(0.3)	0.2	100,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	3.6	3.7	2,200,000
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Total	3.3	3.9	2,300,000
2012	7,900,000
2013	8,200,000
2014	8,900,000
2015	9,300,000
2016	9,800,000
2017-2020	$ 58,000,000