Pension And Postretirement Benefits (Details 4)	12 Months Ended
	May 29, 2011	May 30, 2010	May 31, 2009
Pension Benefits [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.80%	6.90%	6.60%
Long-term rate of return on plan Assets	7.75%	7.75%	7.75%
Long-term rate of compensation increase	4.25%	4.25%	4.25%
Other Benefits [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	5.40%	6.60%	6.40%
Long-term rate of return on plan Assets	3.50%	4.50%	4.50%