Employee Benefit Plans (Health Care Cost Trend Rates) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect of a one percent increase on postretirement benefit obligation	1
Maximum [Member]
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect of a one percent increase on service and interest costs	1
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Components of Benefit Cost: Non-Medicare Eligible	8.50%	8.50%
Components of Benefit Cost: Medicare Eligible	8.00%	8.00%
Benefit Obligations: Non-Medicare Eligible	8.50%	8.50%
Benefit Obligations: Medicare Eligible	8.00%	8.00%
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Expected rates assumed in health care costs trend rates for medical plans (in hundreds)	5.00%