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Pension and Postretirement Benefits (Details 9)	12 Months Ended
Pension and Postretirement Benefits (Details 9)	May 27, 2012	May 29, 2011
Assumed Health Care Cost Trend Rates
Initial health care cost trend rate	7.50%	7.50%
Ultimate health care cost trend rate	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2016	2016

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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