COMMON STOCK (Schedule of Weighted Average Fair Value per Share of Stock Options and Related Valuation Assumptions) (Details) (Stock Options [Member], USD $)	12 Months Ended
Sep. 30, 2012 Y	Sep. 30, 2011 Y	Sep. 30, 2010 Y
Stock Options [Member]
Stock Options
Weighted average fair value per share	$ 9.79	$ 12.31	$ 7.86
Valuation assumptions:
Risk-free interest rate	1.00%	1.20%	2.40%
Expected dividend yield	1.40%	1.10%	1.70%
Expected volatility	41.20%	37.30%	37.20%
Weighted average expected life	4.8	5.3	5.6

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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