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Stock-Based Compensation (Option Pricing Assumptions) (Details) (Stock Options, USD $)	3 Months Ended
	Aug. 26, 2012	Aug. 28, 2011
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value	$ 12.24	$ 14.37
Dividend yield	4.00%	3.50%
Expected volatility of stock	39.70%	39.40%
Risk-free interest rate	0.80%	2.10%
Expected option life (in years)	6 years 6 months	6 years 6 months

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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