Share-Based Compensation (Schedule Of Fair Value Assumptions Under Stock Option Plan) (Details)	3 Months Ended	6 Months Ended
Dec. 31, 2011 years	Dec. 31, 2010 years	Dec. 31, 2011 years	Dec. 31, 2010 years
Share-Based Compensation [Abstract]
Risk free interest rate	0.78%	2.00%	1.06%	2.06%
Expected volatility	49.00%	46.00%	59.00%	47.00%
Expected life of options	4.53	6.50	5.50	6.59
Dividend yield	0.00%	0.00%	0.00%	0.00%

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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