STOCK OPTIONS (Details 4)	12 Months Ended
Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Common Stock [Member]
Expected stock price volatility	41.17%	42.01%	44.13%
Risk-free interest rate	1.64%	2.45%	3.22%
Dividend yield	0.26%	0.27%	0.25%
Forfeiture rate	0.00%	0.00%	0.00%
Expected option life (years)	9	9	9
Class A Common Stock [Member]
Expected stock price volatility	38.92%	39.57%	39.44%
Risk-free interest rate	2.74%	3.02%	2.80%
Dividend yield	0.33%	0.33%	0.33%
Forfeiture rate	0.00%	0.00%	0.00%
Expected option life (years)	7	7	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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