Summary Of Significant Accounting Policies (Stock-Based Compensation) (Details) (USD $)	12 Months Ended
May 27, 2012 Y	May 29, 2011 Y	May 30, 2010 Y
Accounting Policies [Abstract]
Weighted-average fair value (dollars per share)	$ 14.31	$ 12.88	$ 10.74
Dividend yield (percentage)	3.50%	3.00%	2.80%
Expected volatility of stock (percentage)	39.40%	39.10%	40.60%
Risk-free interest rate (percentage)	2.10%	2.20%	3.00%
Expected option life (years)	6.5	6.7	6.6

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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