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Retirement Plans (Schedule Of Defined Benefit Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Pension and Other Postretirement Benefit Expense [Abstract]
Accumulated benefit obligation	$ 169.1	$ 150.0

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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