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Retirement Plans (Details 6)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Pension Benefits
Net periodic benefit cost
Discount rate (as a percent)	4.94%	5.71%	6.20%
Expected long-term rate of return on assets (as a percent)	7.58%	7.84%	8.26%
Rate of compensation increase (as a percent)	3.49%	3.99%	4.00%
Benefit obligations at year-end
Discount rate	4.23%	4.95%	5.71%
Rate of compensation increases	3.48%	3.49%	3.99%
Postretirement Benefits Other than Pensions
Net periodic benefit cost
Discount rate (as a percent)	4.75%	5.50%	5.50%
Benefit obligations at year-end
Discount rate	3.75%	4.75%	5.50%

X

- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Expected rate of compensation increases (for pay-related plans).

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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