Stock-Based Compensation (Option Pricing Assumptions) (Details) (Stock Options [Member], USD $)	3 Months Ended
Aug. 28, 2011 years	Aug. 29, 2010 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average fair value	$ 14.37	$ 12.81
Dividend yield	3.53%	3.01%
Expected volatility of stock	39.40%	39.10%
Risk-free interest rate	2.10%	2.21%
Expected option life (in years)	6.5	6.7

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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